Bug 1485305 - browser/ tests Ensure loadURI always passes a triggeringPrincipal() r=Mossop

Differential Revision: https://phabricator.services.mozilla.com/D4552

--HG--
extra : source : 2cf17e4974823d09d0fdd1aef64e69e840b288a1
extra : intermediate-source : 4771e6948a78507aa95a56e5b324d87dc82e9009

browser/base/content/test/favicons/browser_favicon_change.js

@@ -10,7 +10,7 @@ add_task(async function() {
   let extraTab = gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser);
   let haveChanged = waitForFavicon(extraTab.linkedBrowser, TEST_ROOT + "file_bug970276_favicon1.ico");
 
-  extraTab.linkedBrowser.loadURI(TEST_URL);
+  BrowserTestUtils.loadURI(extraTab.linkedBrowser, TEST_URL);
   await BrowserTestUtils.browserLoaded(extraTab.linkedBrowser);
   await haveChanged;
 

browser/base/content/test/favicons/browser_favicon_change_not_in_document.js

@@ -27,7 +27,7 @@ add_task(async function() {
   let expectedFavicon = TEST_ROOT + "file_generic_favicon.ico";
   let faviconPromise = waitForFavicon(extraTab.linkedBrowser, expectedFavicon);
 
-  extraTab.linkedBrowser.loadURI(TEST_URL);
+  BrowserTestUtils.loadURI(extraTab.linkedBrowser, TEST_URL);
   await BrowserTestUtils.browserLoaded(extraTab.linkedBrowser);
 
   await faviconPromise;

browser/base/content/test/general/browser_alltabslistener.js

@@ -97,8 +97,8 @@ function test() {
     BrowserTestUtils.browserStopped(gBackgroundBrowser, kBasePage),
     BrowserTestUtils.browserStopped(gForegroundBrowser, kBasePage),
   ];
-  gBackgroundBrowser.loadURI(kBasePage);
+  BrowserTestUtils.loadURI(gBackgroundBrowser, kBasePage);
-  gForegroundBrowser.loadURI(kBasePage);
+  BrowserTestUtils.loadURI(gForegroundBrowser, kBasePage);
   Promise.all(promises).then(startTest1);
 }
 
@@ -107,7 +107,7 @@ function runTest(browser, url, next) {
   gAllNotificationsPos = 0;
   gNextTest = next;
   gTestBrowser = browser;
-  browser.loadURI(url);
+  BrowserTestUtils.loadURI(browser, url);
 }
 
 function startTest1() {

browser/base/content/test/general/browser_bug417483.js

@@ -1,7 +1,7 @@
 add_task(async function() {
   let loadedPromise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser, true);
   const htmlContent = "data:text/html, <iframe src='data:text/html,text text'></iframe>";
-  gBrowser.loadURI(htmlContent);
+  BrowserTestUtils.loadURI(gBrowser, htmlContent);
   await loadedPromise;
 
   await ContentTask.spawn(gBrowser.selectedBrowser, { }, async function(arg) {

browser/base/content/test/general/browser_bug431826.js

@@ -6,7 +6,7 @@ add_task(async function() {
   gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser);
 
   let promise = BrowserTestUtils.waitForErrorPage(gBrowser.selectedBrowser);
-  gBrowser.loadURI("https://nocert.example.com/");
+  BrowserTestUtils.loadURI(gBrowser, "https://nocert.example.com/");
   await promise;
 
   await remote(() => {

browser/base/content/test/general/browser_bug519216.js

@@ -3,7 +3,7 @@ function test() {
   gBrowser.addProgressListener(progressListener1);
   gBrowser.addProgressListener(progressListener2);
   gBrowser.addProgressListener(progressListener3);
-  gBrowser.loadURI("data:text/plain,bug519216");
+  BrowserTestUtils.loadURI(gBrowser, "data:text/plain,bug519216");
 }
 
 var calledListener1 = false;

browser/base/content/test/general/browser_bug567306.js

@@ -15,7 +15,9 @@ add_task(async function() {
       ok(true, "pageshow listener called: " + newwindow.gBrowser.currentURI.spec);
       resolve();
     });
-    selectedBrowser.loadURI("data:text/html,<h1 id='h1'>Select Me</h1>");
+    selectedBrowser.loadURI("data:text/html,<h1 id='h1'>Select Me</h1>", {
+      triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+    });
   });
 
   await SimpleTest.promiseFocus(newwindow);

browser/base/content/test/general/browser_bug579872.js

@@ -24,5 +24,5 @@ function test() {
     gBrowser.removeTab(gBrowser.tabs[1]); // example.org tab
     finish();
   }
-  newTab.linkedBrowser.loadURI("http://example.com");
+  BrowserTestUtils.loadURI(newTab.linkedBrowser, "http://example.com");
 }

browser/base/content/test/general/browser_bug581253.js

@@ -24,7 +24,7 @@ add_task(async function test_remove_bookmark_with_tag_via_edit_bookmark() {
 
   Assert.ok(await PlacesUtils.bookmarks.fetch({url: testURL}), "the test url is bookmarked");
 
-  gBrowser.loadURI(testURL);
+  BrowserTestUtils.loadURI(gBrowser, testURL);
 
   await BrowserTestUtils.waitForCondition(
     () => BookmarkingUI.status == BookmarkingUI.STATUS_STARRED,

browser/base/content/test/general/browser_bug624734.js

@@ -30,5 +30,5 @@ function test() {
     }
   });
 
-  tab.linkedBrowser.loadURI("http://example.com/browser/browser/base/content/test/general/dummy_page.html");
+  BrowserTestUtils.loadURI(tab.linkedBrowser, "http://example.com/browser/browser/base/content/test/general/dummy_page.html");
 }

browser/base/content/test/general/browser_bug734076.js

@@ -91,7 +91,7 @@ add_task(async function() {
 
   for (let test of tests) {
     let loadedPromise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
-    gBrowser.loadURI(test.url);
+    BrowserTestUtils.loadURI(gBrowser, test.url);
     await loadedPromise;
 
     info("Run subtest " + test.name);

browser/base/content/test/general/browser_documentnavigation.js

@@ -82,7 +82,7 @@ async function expectFocusOnF6(backward, expectedDocument, expectedElement, onCo
 // Load a page and navigate between it and the chrome window.
 add_task(async function() {
   let page1Promise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
-  gBrowser.selectedBrowser.loadURI(testPage1);
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, testPage1);
   await page1Promise;
 
   // When the urlbar is focused, pressing F6 should focus the root of the content page.

browser/base/content/test/general/browser_e10s_chrome_process.js

@@ -14,7 +14,7 @@ function makeTest(name, startURL, startProcessIsRemote, endURL, endProcessIsRemo
 
     // Load the initial URL and make sure we are in the right initial process
     info("Loading initial URL");
-    browser.loadURI(startURL);
+    BrowserTestUtils.loadURI(browser, startURL);
     await BrowserTestUtils.browserLoaded(browser);
 
     is(browser.currentURI.spec, startURL, "Shouldn't have been redirected");

browser/base/content/test/general/browser_e10s_switchbrowser.js

@@ -48,6 +48,7 @@ var check_history = async function() {
 
   for (let i = 0; i < count; i++) {
     let entry = sessionHistory.entries[i];
+    info("Checking History Entry:", entry.uri);
     is(entry.uri, gExpectedHistory.entries[i].uri, "Should have the right URI");
     is(entry.title, gExpectedHistory.entries[i].title, "Should have the right title");
   }
@@ -77,7 +78,10 @@ var waitForLoad = async function(uri) {
 // Waits for a load and updates the known history
 var waitForLoadWithFlags = async function(uri, flags = Ci.nsIWebNavigation.LOAD_FLAGS_NONE) {
   info("Loading " + uri + " flags = " + flags);
-  gBrowser.selectedBrowser.loadURI(uri, { flags });
+  gBrowser.selectedBrowser.loadURI(uri, {
+    flags,
+    triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+  });
 
   await BrowserTestUtils.browserStopped(gBrowser);
   if (!(flags & Ci.nsIWebNavigation.LOAD_FLAGS_BYPASS_HISTORY)) {

browser/base/content/test/general/browser_findbarClose.js

@@ -12,7 +12,7 @@ add_task(async function findbar_test() {
   let promise = ContentTask.spawn(newTab.linkedBrowser, null, async function() {
     await ContentTaskUtils.waitForEvent(this, "DOMContentLoaded", false);
   });
-  newTab.linkedBrowser.loadURI("http://example.com/browser/" +
+  BrowserTestUtils.loadURI(newTab.linkedBrowser, "http://example.com/browser/" +
     "browser/base/content/test/general/test_bug628179.html");
   await promise;
 

browser/base/content/test/general/browser_refreshBlocker.js

@@ -91,7 +91,7 @@ async function testRealRefresh(refreshPage, delay) {
   }, async function(browser) {
     await pushPrefs(["accessibility.blockautorefresh", true]);
 
-    browser.loadURI(refreshPage + "?p=" + TARGET_PAGE + "&d=" + delay);
+    BrowserTestUtils.loadURI(browser, refreshPage + "?p=" + TARGET_PAGE + "&d=" + delay);
     await BrowserTestUtils.browserLoaded(browser);
 
     // Once browserLoaded resolves, all nsIWebProgressListener callbacks

browser/base/content/test/general/browser_restore_isAppTab.js

@@ -62,7 +62,7 @@ add_task(async function navigate() {
   isAppTab = await isBrowserAppTab(browser);
   ok(isAppTab, "Docshell should think it is an app tab");
 
-  gBrowser.loadURI(DUMMY);
+  BrowserTestUtils.loadURI(gBrowser, DUMMY);
   await BrowserTestUtils.browserStopped(gBrowser);
   loadFrameScript(browser);
   isAppTab = await isBrowserAppTab(browser);
@@ -76,7 +76,7 @@ add_task(async function navigate() {
   isAppTab = await isBrowserAppTab(browser);
   ok(isAppTab, "Docshell should think it is an app tab");
 
-  gBrowser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(gBrowser, "about:robots");
   await BrowserTestUtils.browserStopped(gBrowser);
   loadFrameScript(browser);
   isAppTab = await isBrowserAppTab(browser);

browser/base/content/test/general/browser_save_link-perwindowpb.js

@@ -14,7 +14,7 @@ function triggerSave(aWindow, aCallback) {
   let testBrowser = aWindow.gBrowser.selectedBrowser;
   // This page sets a cookie if and only if a cookie does not exist yet
   let testURI = "http://mochi.test:8888/browser/browser/base/content/test/general/bug792517-2.html";
-  testBrowser.loadURI(testURI);
+  BrowserTestUtils.loadURI(testBrowser, testURI);
   BrowserTestUtils.browserLoaded(testBrowser, false, testURI)
                   .then(() => {
     waitForFocus(function() {

browser/base/content/test/general/browser_save_link_when_window_navigates.js

@@ -29,7 +29,7 @@ function triggerSave(aWindow, aCallback) {
   let testBrowser = aWindow.gBrowser.selectedBrowser;
   let testURI = "http://mochi.test:8888/browser/browser/base/content/test/general/navigating_window_with_download.html";
   windowObserver.setCallback(onUCTDialog);
-  testBrowser.loadURI(testURI);
+  BrowserTestUtils.loadURI(testBrowser, testURI);
 
   // Create the folder the link will be saved into.
   var destDir = createTemporarySaveDirectory();

browser/base/content/test/general/browser_save_video.js

@@ -12,7 +12,7 @@ add_task(async function() {
   var fileName;
 
   let loadPromise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
-  gBrowser.loadURI("http://mochi.test:8888/browser/browser/base/content/test/general/web_video.html");
+  BrowserTestUtils.loadURI(gBrowser, "http://mochi.test:8888/browser/browser/base/content/test/general/web_video.html");
   await loadPromise;
 
   let popupShownPromise = BrowserTestUtils.waitForEvent(document, "popupshown");

browser/base/content/test/general/browser_ssl_error_reports.js

@@ -64,7 +64,7 @@ async function testSendReportAutomatically(testURL, suffix, errorURISuffix) {
 
   // Load the page and wait for the error report submission.
   let promiseStatus = createReportResponseStatusPromise(URL_REPORTS + suffix);
-  browser.loadURI(testURL);
+  BrowserTestUtils.loadURI(browser, testURL);
   await BrowserTestUtils.waitForErrorPage(browser);
 
   ok(!isErrorStatus(await promiseStatus),
@@ -88,7 +88,7 @@ async function testSetAutomatic(testURL, suffix, errorURISuffix) {
   let browser = tab.linkedBrowser;
 
   // Load the page.
-  browser.loadURI(testURL);
+  BrowserTestUtils.loadURI(browser, testURL);
   await BrowserTestUtils.waitForErrorPage(browser);
 
   // Check that we loaded the right error page.
@@ -129,7 +129,7 @@ async function testSendReportDisabled(testURL, errorURISuffix) {
   let browser = tab.linkedBrowser;
 
   // Load the page.
-  browser.loadURI(testURL);
+  BrowserTestUtils.loadURI(browser, testURL);
   await BrowserTestUtils.waitForErrorPage(browser);
 
   // Check that we loaded the right error page.

browser/base/content/test/general/browser_star_hsts.js

@@ -68,6 +68,6 @@ function promiseTabLoadEvent(aTab, aURL, aFinalURL) {
     aFinalURL = aURL;
 
   info("Wait for load tab event");
-  aTab.linkedBrowser.loadURI(aURL);
+  BrowserTestUtils.loadURI(aTab.linkedBrowser, aURL);
   return BrowserTestUtils.browserLoaded(aTab.linkedBrowser, false, aFinalURL);
 }

browser/base/content/test/general/browser_tab_detach_restore.js

@@ -10,7 +10,7 @@ add_task(async function() {
     SessionStore.forgetClosedWindow(0);
 
   let tab = BrowserTestUtils.addTab(gBrowser);
-  tab.linkedBrowser.loadURI(uri);
+  BrowserTestUtils.loadURI(tab.linkedBrowser, uri);
   await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
   await TabStateFlusher.flush(tab.linkedBrowser);
 

browser/base/content/test/general/browser_tab_dragdrop.js

@@ -27,7 +27,7 @@ var clickTest = async function(tab) {
 };
 
 function loadURI(tab, url) {
-  tab.linkedBrowser.loadURI(url);
+  BrowserTestUtils.loadURI(tab.linkedBrowser, url);
   return BrowserTestUtils.browserLoaded(tab.linkedBrowser);
 }
 

browser/base/content/test/general/browser_testOpenNewRemoteTabsFromNonRemoteBrowsers.js

@@ -25,7 +25,7 @@ function frame_script() {
  * Promise that resolves when the browser is no longer remote.
  */
 function prepareNonRemoteBrowser(aWindow, browser) {
-  browser.loadURI(NON_REMOTE_PAGE);
+  BrowserTestUtils.loadURI(browser, NON_REMOTE_PAGE);
   return BrowserTestUtils.browserLoaded(browser);
 }
 

browser/base/content/test/general/browser_typeAheadFind.js

@@ -5,7 +5,7 @@
 add_task(async function() {
   let testWindow = await BrowserTestUtils.openNewBrowserWindow();
 
-  testWindow.gBrowser.loadURI("data:text/html,<h1>A Page</h1>");
+  BrowserTestUtils.loadURI(testWindow.gBrowser, "data:text/html,<h1>A Page</h1>");
   await BrowserTestUtils.browserLoaded(testWindow.gBrowser.selectedBrowser);
 
   await SimpleTest.promiseFocus(testWindow.gBrowser.selectedBrowser);

browser/base/content/test/general/browser_unknownContentType_title.js

@@ -21,7 +21,7 @@ add_task(async function() {
 
   is(gBrowser.contentTitle, "Test Page", "Should have the right title.");
 
-  browser.loadURI(unknown_url);
+  BrowserTestUtils.loadURI(browser, unknown_url);
   let win = await waitForNewWindow();
   is(win.location, "chrome://mozapps/content/downloads/unknownContentType.xul",
      "Should have seen the unknown content dialog.");

browser/base/content/test/general/head.js

@@ -303,7 +303,7 @@ var FullZoomHelper = {
           resolve();
       });
 
-      tab.linkedBrowser.loadURI(url);
+      BrowserTestUtils.loadURI(tab.linkedBrowser, url);
     });
   },
 

browser/base/content/test/pageinfo/browser_pageinfo_firstPartyIsolation.js

@@ -74,7 +74,7 @@ async function test() {
   let url = "https://example.com/browser/browser/base/content/test/pageinfo/image.html";
   gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser);
   let loadPromise = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser, false, url);
-  gBrowser.selectedBrowser.loadURI(url);
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, url);
   await loadPromise;
 
   // Pass a dummy imageElement, if there isn't an imageElement, pageInfo.js

browser/base/content/test/pageinfo/browser_pageinfo_image_info.js

@@ -46,5 +46,5 @@ function test() {
     }, {capture: true, once: true});
   });
 
-  gBrowser.loadURI(URI);
+  BrowserTestUtils.loadURI(gBrowser, URI);
 }

browser/base/content/test/pageinfo/browser_pageinfo_images.js

@@ -28,7 +28,7 @@ function test() {
     }, {capture: true, once: true});
   });
 
-  gBrowser.selectedBrowser.loadURI(
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser,
     "data:text/html," +
     "<html>" +
     "  <head>" +

browser/base/content/test/pageinfo/browser_pageinfo_svg_image.js

@@ -35,5 +35,5 @@ function test() {
     }, {capture: true, once: true});
   });
 
-  gBrowser.selectedBrowser.loadURI(URI);
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, URI);
 }

browser/base/content/test/plugins/browser_pluginCrashReportNonDeterminism.js

@@ -136,7 +136,7 @@ add_task(async function testChromeHearsPluginCrashFirst() {
   let win = await BrowserTestUtils.openNewBrowserWindow({remote: true});
   let browser = win.gBrowser.selectedBrowser;
 
-  browser.loadURI(CRASH_URL);
+  BrowserTestUtils.loadURI(browser, CRASH_URL);
   await BrowserTestUtils.browserLoaded(browser);
 
   // In this case, we want the <object> to match the -moz-handler-crashed
@@ -205,7 +205,7 @@ add_task(async function testContentHearsCrashFirst() {
   let win = await BrowserTestUtils.openNewBrowserWindow({remote: true});
   let browser = win.gBrowser.selectedBrowser;
 
-  browser.loadURI(CRASH_URL);
+  BrowserTestUtils.loadURI(browser, CRASH_URL);
   await BrowserTestUtils.browserLoaded(browser);
 
   // In this case, we want the <object> to match the -moz-handler-crashed

browser/base/content/test/popupNotifications/head.js

@@ -36,7 +36,7 @@ function promiseTabLoadEvent(tab, url) {
   let browser = tab.linkedBrowser;
 
   if (url) {
-    browser.loadURI(url);
+    BrowserTestUtils.loadURI(browser, url);
   }
 
   return BrowserTestUtils.browserLoaded(browser, false, url);

browser/base/content/test/siteIdentity/browser_check_identity_state.js

@@ -275,7 +275,7 @@ async function noCertErrorTest(secureCheck) {
   gBrowser.selectedTab = newTab;
 
   let promise = BrowserTestUtils.waitForErrorPage(gBrowser.selectedBrowser);
-  gBrowser.loadURI("https://nocert.example.com/");
+  BrowserTestUtils.loadURI(gBrowser, "https://nocert.example.com/");
   await promise;
   is(getIdentityMode(), "unknownIdentity", "Identity should be unknown");
   is(getConnectionState(), "not-secure", "Connection should be file");

browser/base/content/test/siteIdentity/browser_csp_block_all_mixedcontent.js

@@ -40,7 +40,7 @@ function runTests() {
   // Starting the test
   var url = PRE_PATH + "file_csp_block_all_mixedcontent.html";
   BrowserTestUtils.browserLoaded(gTestBrowser, false, url).then(verifyUInotDegraded);
-  gTestBrowser.loadURI(url);
+  BrowserTestUtils.loadURI(gTestBrowser, url);
 }
 
 // ------------------------------------------------------

browser/base/content/test/tabs/browser_abandonment_telemetry.js

@@ -77,7 +77,7 @@ const PROBE_TESTS = [
     category: "back",
 
     async prepare(browser) {
-      browser.loadURI(PAGE_2);
+      BrowserTestUtils.loadURI(browser, PAGE_2);
       await BrowserTestUtils.browserLoaded(browser);
     },
 
@@ -96,7 +96,7 @@ const PROBE_TESTS = [
     category: "forward",
 
     async prepare(browser) {
-      browser.loadURI(PAGE_2);
+      BrowserTestUtils.loadURI(browser, PAGE_2);
       await BrowserTestUtils.browserLoaded(browser);
       let pageShow =
         BrowserTestUtils.waitForContentEvent(browser, "pageshow");
@@ -119,9 +119,9 @@ const PROBE_TESTS = [
     category: "historyNavigation",
 
     async prepare(browser) {
-      browser.loadURI(PAGE_2);
+      BrowserTestUtils.loadURI(browser, PAGE_2);
       await BrowserTestUtils.browserLoaded(browser);
-      browser.loadURI("http://example.com");
+      BrowserTestUtils.loadURI(browser, "http://example.com");
       await BrowserTestUtils.browserLoaded(browser);
       await TabStateFlusher.flush(browser);
     },
@@ -141,9 +141,9 @@ const PROBE_TESTS = [
     category: "historyNavigation",
 
     async prepare(browser) {
-      browser.loadURI(PAGE_2);
+      BrowserTestUtils.loadURI(browser, PAGE_2);
       await BrowserTestUtils.browserLoaded(browser);
-      browser.loadURI("http://example.com");
+      BrowserTestUtils.loadURI(browser, "http://example.com");
       await BrowserTestUtils.browserLoaded(browser);
       let pageShow =
         BrowserTestUtils.waitForContentEvent(browser, "pageshow");

browser/base/content/test/tabs/browser_allow_process_switches_despite_related_browser.js

@@ -26,7 +26,7 @@ add_task(async function() {
   let viewSourceBrowser = viewSourceTab.linkedBrowser;
   let promiseLoad =
     BrowserTestUtils.browserLoaded(viewSourceBrowser, false, uriString);
-  viewSourceBrowser.loadURI(uriString);
+  BrowserTestUtils.loadURI(viewSourceBrowser, uriString);
   let href = await promiseLoad;
   is(href, uriString,
     "Check file:// URI loads in a browser that was previously for view-source");

browser/base/content/test/tabs/browser_audioTabIcon.js

@@ -369,7 +369,7 @@ async function test_cross_process_load() {
     );
 
     // Go to a different process.
-    browser.loadURI("about:mozilla");
+    BrowserTestUtils.loadURI(browser, "about:mozilla");
     await BrowserTestUtils.browserLoaded(browser);
 
     await soundPlayingStoppedPromise;

browser/base/content/test/tabs/browser_contextmenu_openlink_after_tabnavigated.js

@@ -17,7 +17,7 @@ add_task(async function test_contextmenu_openlink_after_tabnavigated() {
   info("Popup Shown");
 
   info("Navigate the tab with the opened context menu");
-  gBrowser.selectedBrowser.loadURI("about:blank");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:blank");
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   let awaitNewTabOpen = BrowserTestUtils.waitForNewTab(gBrowser, "http://example.com/");

browser/base/content/test/tabs/browser_new_web_tab_in_file_process_pref.js

@@ -62,7 +62,7 @@ add_task(async function() {
 
     // Check that same-origin load doesn't break the affinity.
     promiseLoad = BrowserTestUtils.browserLoaded(httpBrowser, false, TEST_HTTP + "foo");
-    httpBrowser.loadURI(TEST_HTTP + "foo");
+    BrowserTestUtils.loadURI(httpBrowser, TEST_HTTP + "foo");
     await promiseLoad;
     await CheckBrowserInPid(httpBrowser, filePid,
       "Check that http tab still in file content process after same origin load.");
@@ -93,7 +93,7 @@ add_task(async function() {
 
     // Check that file:// URI load doesn't break the affinity.
     promiseLoad = BrowserTestUtils.browserLoaded(httpBrowser, false, uriString);
-    httpBrowser.loadURI(uriString);
+    BrowserTestUtils.loadURI(httpBrowser, uriString);
     await promiseLoad;
     await CheckBrowserInPid(httpBrowser, filePid,
       "Check that http tab still in file content process after file:// load.");
@@ -109,7 +109,7 @@ add_task(async function() {
 
     // Check that cross-origin load does break the affinity.
     promiseLoad = BrowserTestUtils.browserLoaded(httpBrowser, false, TEST_CROSS_ORIGIN);
-    httpBrowser.loadURI(TEST_CROSS_ORIGIN);
+    BrowserTestUtils.loadURI(httpBrowser, TEST_CROSS_ORIGIN);
     await promiseLoad;
     await CheckBrowserNotInPid(httpBrowser, filePid,
       "Check that http tab not in file content process after cross origin load.");

browser/base/content/test/tabs/browser_opened_file_tab_navigated_to_web.js

@@ -36,7 +36,7 @@ add_task(async function() {
   let openedBrowser = openedTab.linkedBrowser;
 
   // Ensure that new file:// tab can be navigated to web content.
-  openedBrowser.loadURI(WEB_ADDRESS);
+  BrowserTestUtils.loadURI(openedBrowser, "http://example.org/");
   let href = await BrowserTestUtils.browserLoaded(openedBrowser, false, WEB_ADDRESS);
   is(href, WEB_ADDRESS,
      "Check that new file:// page has navigated successfully to web content");

browser/base/content/test/tabs/browser_viewsource_of_data_URI_in_file_process.js

@@ -20,7 +20,7 @@ add_task(async function() {
     // Navigate to data URI.
     let promiseLoad = BrowserTestUtils.browserLoaded(fileBrowser, false,
                                                      DATA_URI);
-    fileBrowser.loadURI(DATA_URI);
+    BrowserTestUtils.loadURI(fileBrowser, DATA_URI);
     let href = await promiseLoad;
     is(href, DATA_URI, "Check data URI loaded.");
     let dataPid = await ContentTask.spawn(fileBrowser, null, () => {

browser/base/content/test/urlbar/browser_URLBarSetURI.js

@@ -55,7 +55,7 @@ var tests = [
     loadTabInWindow(window, function(tab) {
       // Load a new URL and then immediately stop it, to simulate a page load
       // error.
-      tab.linkedBrowser.loadURI("http://test1.example.com");
+      BrowserTestUtils.loadURI(tab.linkedBrowser, "http://test1.example.com");
       tab.linkedBrowser.stop();
       is(gURLBar.textValue, "example.com", "URL bar had user/pass stripped after load error");
       gBrowser.removeTab(tab);

browser/base/content/test/urlbar/browser_bug304198.js

@@ -14,9 +14,9 @@ add_task(async function() {
   let loaded1 = BrowserTestUtils.browserLoaded(deletedURLTab.linkedBrowser, false, testURL);
   let loaded2 = BrowserTestUtils.browserLoaded(fullURLTab.linkedBrowser, false, testURL);
   let loaded3 = BrowserTestUtils.browserLoaded(partialURLTab.linkedBrowser, false, testURL);
-  deletedURLTab.linkedBrowser.loadURI(testURL);
+  BrowserTestUtils.loadURI(deletedURLTab.linkedBrowser, testURL);
-  fullURLTab.linkedBrowser.loadURI(testURL);
+  BrowserTestUtils.loadURI(fullURLTab.linkedBrowser, testURL);
-  partialURLTab.linkedBrowser.loadURI(testURL);
+  BrowserTestUtils.loadURI(partialURLTab.linkedBrowser, testURL);
   await Promise.all([loaded1, loaded2, loaded3]);
 
   testURL = gURLBar.trimValue(testURL);

browser/base/content/test/urlbar/browser_bug623155.js

@@ -109,7 +109,7 @@ function delayed(aIsSelectedTab) {
 
   if (!aIsSelectedTab) {
     // If this was a background request, go on a foreground request.
-    gBrowser.selectedBrowser.loadURI(REDIRECT_FROM + "#FG");
+    BrowserTestUtils.loadURI(gBrowser.selectedBrowser, REDIRECT_FROM + "#FG");
   } else {
     // Othrewise, nothing to do remains.
     finish();

browser/base/content/test/urlbar/browser_tabMatchesInAwesomebar.js

@@ -59,7 +59,7 @@ add_task(async function step_3() {
 add_task(async function step_4() {
   info("Running step 4 - ensure we don't register subframes as open pages");
   let tab = BrowserTestUtils.addTab(gBrowser);
-  tab.linkedBrowser.loadURI('data:text/html,<body><iframe src=""></iframe></body>');
+  BrowserTestUtils.loadURI(tab.linkedBrowser, 'data:text/html,<body><iframe src=""></iframe></body>');
   await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
 
   await ContentTask.spawn(tab.linkedBrowser, null, async function() {
@@ -82,7 +82,7 @@ add_task(async function step_6() {
   info("Running step 6 - check swapBrowsersAndCloseOther preserves registered switch-to-tab result");
   let tabToKeep = BrowserTestUtils.addTab(gBrowser);
   let tab = BrowserTestUtils.addTab(gBrowser);
-  tab.linkedBrowser.loadURI("about:mozilla");
+  BrowserTestUtils.loadURI(tab.linkedBrowser, "about:mozilla");
   await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
 
   gBrowser.updateBrowserRemoteness(tabToKeep.linkedBrowser, tab.linkedBrowser.isRemoteBrowser);
@@ -132,7 +132,7 @@ function loadTab(tab, url) {
   });
 
   info("Loading page: " + url);
-  tab.linkedBrowser.loadURI(url);
+  BrowserTestUtils.loadURI(tab.linkedBrowser, url);
   return Promise.all([ loaded, visited ]);
 }
 

browser/base/content/test/urlbar/browser_urlbarAboutHomeLoading.js

@@ -33,7 +33,7 @@ add_task(async function clearURLBarAfterParentProcessURLInExistingTab() {
     newTabBrowser.addEventListener("Initialized", async function() {
       resolve(gBrowser.selectedTab);
     }, {capture: true, once: true});
-    newTabBrowser.loadURI("about:preferences");
+    BrowserTestUtils.loadURI(newTabBrowser, "about:preferences");
   });
   document.getElementById("home-button").click();
   await BrowserTestUtils.browserLoaded(tab.linkedBrowser, false, HomePage.get());

browser/base/content/test/urlbar/browser_urlbarTrimURLs.js

@@ -69,7 +69,7 @@ add_task(async function() {
 
   let promiseLoaded = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser,
                                                      false, "http://example.com/");
-  gBrowser.loadURI("http://example.com/");
+  BrowserTestUtils.loadURI(gBrowser, "http://example.com/");
   await promiseLoaded;
 
   await testCopy("example.com", "http://example.com/");

browser/base/content/test/webextensions/browser_extension_sideloading.js

@@ -100,12 +100,12 @@ add_task(async function() {
 
   // Navigate away from the starting page to force about:addons to load
   // in a new tab during the tests below.
-  gBrowser.selectedBrowser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:robots");
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   registerCleanupFunction(async function() {
     // Return to about:blank when we're done
-    gBrowser.selectedBrowser.loadURI("about:blank");
+    BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:blank");
     await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
   });
 

browser/base/content/test/webextensions/browser_extension_update_background.js

@@ -41,12 +41,12 @@ add_task(async function setup() {
 
   // Navigate away from the initial page so that about:addons always
   // opens in a new tab during tests
-  gBrowser.selectedBrowser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:robots");
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   registerCleanupFunction(async function() {
     // Return to about:blank when we're done
-    gBrowser.selectedBrowser.loadURI("about:blank");
+    BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:blank");
     await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
   });
 });

browser/base/content/test/webextensions/browser_extension_update_background_noprompt.js

@@ -21,12 +21,12 @@ add_task(async function setup() {
 
   // Navigate away from the initial page so that about:addons always
   // opens in a new tab during tests
-  gBrowser.selectedBrowser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:robots");
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   registerCleanupFunction(async function() {
     // Return to about:blank when we're done
-    gBrowser.selectedBrowser.loadURI("about:blank");
+    BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:blank");
     await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
   });
 });

browser/base/content/test/webextensions/browser_permissions_installTrigger.js

@@ -3,7 +3,7 @@
 const INSTALL_PAGE = `${BASE}/file_install_extensions.html`;
 
 async function installTrigger(filename) {
-  gBrowser.selectedBrowser.loadURI(INSTALL_PAGE);
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, INSTALL_PAGE);
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   ContentTask.spawn(gBrowser.selectedBrowser, `${BASE}/${filename}`, async function(url) {

browser/base/content/test/webextensions/browser_permissions_mozAddonManager.js

@@ -3,7 +3,7 @@
 const INSTALL_PAGE = `${BASE}/file_install_extensions.html`;
 
 async function installMozAM(filename) {
-  gBrowser.selectedBrowser.loadURI(INSTALL_PAGE);
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, INSTALL_PAGE);
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   await ContentTask.spawn(gBrowser.selectedBrowser, `${BASE}/${filename}`, async function(url) {

browser/base/content/test/webextensions/browser_permissions_unsigned.js

@@ -15,7 +15,7 @@ add_task(async function test_unsigned() {
 
   let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser);
 
-  gBrowser.selectedBrowser.loadURI(`${BASE}/file_install_extensions.html`);
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, `${BASE}/file_install_extensions.html`);
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   ContentTask.spawn(gBrowser.selectedBrowser, `${BASE}/browser_webext_unsigned.xpi`, async function(url) {

browser/base/content/test/webextensions/browser_update_interactive_noprompt.js

@@ -19,7 +19,7 @@ add_task(async function setup() {
 async function testUpdateNoPrompt(filename, id,
                                   initialVersion = "1.0", updateVersion = "2.0") {
   // Navigate away to ensure that BrowserOpenAddonMgr() opens a new tab
-  gBrowser.selectedBrowser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:robots");
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   // Install initial version of the test extension

browser/base/content/test/webextensions/head.js

@@ -401,7 +401,7 @@ async function interactiveUpdateTest(autoUpdate, checkFn) {
 
   // Navigate away from the starting page to force about:addons to load
   // in a new tab during the tests below.
-  gBrowser.selectedBrowser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:robots");
   await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
 
   // Install version 1.0 of the test extension

browser/base/content/test/webrtc/browser_devices_get_user_media.js

@@ -531,7 +531,7 @@ var gTests = [
   run: async function checkNoAlwaysOnHttp() {
     // Load an http page instead of the https version.
     let browser = gBrowser.selectedBrowser;
-    browser.loadURI(browser.documentURI.spec.replace("https://", "http://"));
+    BrowserTestUtils.loadURI(browser, browser.documentURI.spec.replace("https://", "http://"));
     await BrowserTestUtils.browserLoaded(browser);
 
     // Initially set both permissions to 'allow'.

browser/components/customizableui/test/browser_exit_background_customize_mode.js

@@ -21,7 +21,7 @@ add_task(async function test_exit_background_customize_mode() {
   await BrowserTestUtils.switchTab(gBrowser, nonCustomizingTab);
   await finishedCustomizing;
 
-  custTab.linkedBrowser.loadURI("http://example.com");
+  BrowserTestUtils.loadURI(custTab.linkedBrowser, "http://example.com");
   await BrowserTestUtils.browserLoaded(custTab.linkedBrowser);
 
   Assert.equal(gBrowser.tabContainer.querySelector("tab[customizemode=true]"),

browser/components/feeds/test/browser/browser_registerProtocolHandler_notification.js

@@ -7,7 +7,7 @@ add_task(async function() {
   let notificationValue = "Protocol Registration: web+testprotocol";
   let testURI = TEST_PATH + "browser_registerProtocolHandler_notification.html";
 
-  window.gBrowser.selectedBrowser.loadURI(testURI);
+  BrowserTestUtils.loadURI(window.gBrowser.selectedBrowser, testURI);
   await TestUtils.waitForCondition(function() {
     // Do not start until the notification is up
     let notificationBox = window.gBrowser.getNotificationBox();

browser/components/originattributes/test/browser/browser_firstPartyIsolation_aboutPages.js

@@ -106,7 +106,7 @@ add_task(async function test_remote_window_open_data_uri2() {
   // The iframe test2.html will fetch test2.js, which will have cookies.
   const DATA_URI = `data:text/html,
                     <iframe id="iframe1" src="http://mochi.test:8888/browser/browser/components/originattributes/test/browser/test2.html"></iframe>`;
-  browser.loadURI(DATA_URI);
+  BrowserTestUtils.loadURI(browser, DATA_URI);
   await BrowserTestUtils.browserLoaded(browser, true);
 
   await ContentTask.spawn(browser, {}, async function() {

browser/components/originattributes/test/browser/browser_firstPartyIsolation_blobURI.js

@@ -22,7 +22,7 @@ add_task(async function test_blob_uri_inherit_oa_from_content() {
   // First we load a normal web page.
   let win = await BrowserTestUtils.openNewBrowserWindow({ remote: true });
   let browser = win.gBrowser.selectedBrowser;
-  browser.loadURI(BASE_URI);
+  BrowserTestUtils.loadURI(browser, BASE_URI);
   await BrowserTestUtils.browserLoaded(browser);
 
   // Then navigate to the blob: URI.

browser/components/originattributes/test/browser/browser_firstPartyIsolation_js_uri.js

@@ -12,7 +12,7 @@ add_task(async function test_remote_window_open_js_uri() {
 
   Assert.ok(browser.isRemoteBrowser, "should be a remote browser");
 
-  browser.loadURI(`javascript:1;`);
+  BrowserTestUtils.loadURI(browser, `javascript:1;`);
   await ContentTask.spawn(browser, {}, async function() {
     info("origin " + content.document.nodePrincipal.origin);
 
@@ -35,7 +35,7 @@ add_task(async function test_remote_window_open_js_uri2() {
 
   Assert.ok(browser.isRemoteBrowser, "should be a remote browser");
 
-  browser.loadURI(`javascript:
+  BrowserTestUtils.loadURI(browser, `javascript:
     let iframe = document.createElement("iframe");
     iframe.src = "http://example.com";
     iframe.id = "iframe1";

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_blobUrl.js

@@ -10,7 +10,7 @@ add_task(async function test() {
   info("Creating a normal window...");
   let win = await BrowserTestUtils.openNewBrowserWindow();
   let tab = win.gBrowser.selectedBrowser;
-  tab.loadURI(BASE_URI);
+  BrowserTestUtils.loadURI(tab, BASE_URI);
   await BrowserTestUtils.browserLoaded(tab);
 
   let blobURL;
@@ -25,7 +25,7 @@ add_task(async function test() {
   info("Creating a private window...");
   let privateWin = await BrowserTestUtils.openNewBrowserWindow({ private: true });
   let privateTab = privateWin.gBrowser.selectedBrowser;
-  privateTab.loadURI(BASE_URI);
+  BrowserTestUtils.loadURI(privateTab, BASE_URI);
   await BrowserTestUtils.browserLoaded(privateTab);
 
   await ContentTask.spawn(privateTab, blobURL, function(url) {

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_concurrent.js

@@ -27,7 +27,7 @@ add_task(async function test() {
   // Step 1
   let non_private_browser = gBrowser.selectedBrowser;
   let url = prefix + "?action=set&name=test&value=value&initial=true";
-  non_private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(non_private_browser, url);
   await BrowserTestUtils.browserLoaded(non_private_browser, false, url);
 
 
@@ -35,13 +35,13 @@ add_task(async function test() {
   let private_window = await BrowserTestUtils.openNewBrowserWindow({ private: true });
   let private_browser = private_window.getBrowser().selectedBrowser;
   url = prefix + "?action=set&name=test2&value=value2";
-  private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(private_browser, url);
   await BrowserTestUtils.browserLoaded(private_browser, false, url);
 
 
   // Step 3
   url = prefix + "?action=get&name=test2";
-  non_private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(non_private_browser, url);
   await BrowserTestUtils.browserLoaded(non_private_browser, false, url);
   let elts = await getElts(non_private_browser);
   isnot(elts[0], "value2", "public window shouldn't see private storage");
@@ -50,7 +50,7 @@ add_task(async function test() {
 
   // Step 4
   url = prefix + "?action=get&name=test";
-  private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(private_browser, url);
   await BrowserTestUtils.browserLoaded(private_browser, false, url);
   elts = await getElts(private_browser);
   isnot(elts[0], "value", "private window shouldn't see public storage");
@@ -66,7 +66,7 @@ add_task(async function test() {
   private_browser = private_window.getBrowser().selectedBrowser;
 
   url = prefix + "?action=get&name=test2";
-  private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(private_browser, url);
   await BrowserTestUtils.browserLoaded(private_browser, false, url);
   elts = await getElts(private_browser);
   isnot(elts[0], "value2", "public window shouldn't see cleared private storage");
@@ -82,14 +82,14 @@ add_task(async function test() {
   private_browser = private_window.getBrowser().selectedBrowser;
 
   url = prefix + "?action=set&name=test3&value=value3";
-  private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(private_browser, url);
   await BrowserTestUtils.browserLoaded(private_browser, false, url);
   elts = await getElts(private_browser);
   is(elts[1], "1", "private window should only see new private items");
 
   // Cleanup.
   url = prefix + "?final=true";
-  non_private_browser.loadURI(url);
+  BrowserTestUtils.loadURI(non_private_browser, url);
   await BrowserTestUtils.browserLoaded(non_private_browser, false, url);
   private_window.close();
 });

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_crh.js

@@ -20,7 +20,7 @@ add_task(async function test() {
 
   let privateWin = await BrowserTestUtils.openNewBrowserWindow({private: true});
   let privateBrowser = privateWin.gBrowser.selectedBrowser;
-  privateBrowser.loadURI(testURI);
+  BrowserTestUtils.loadURI(privateBrowser, testURI);
   await BrowserTestUtils.browserLoaded(privateBrowser);
 
   info("Test on private window");
@@ -29,7 +29,7 @@ add_task(async function test() {
 
   let win = await BrowserTestUtils.openNewBrowserWindow();
   let browser = win.gBrowser.selectedBrowser;
-  browser.loadURI(testURI);
+  BrowserTestUtils.loadURI(browser, testURI);
   await BrowserTestUtils.browserLoaded(browser);
 
   info("Test on public window");

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_geoprompt.js

@@ -36,14 +36,14 @@ add_task(async function test() {
 
   let win = await BrowserTestUtils.openNewBrowserWindow();
   let browser = win.gBrowser.selectedBrowser;
-  browser.loadURI(testPageURL);
+  BrowserTestUtils.loadURI(browser, testPageURL);
   await BrowserTestUtils.browserLoaded(browser);
 
   await checkGeolocation(false, win);
 
   let privateWin = await BrowserTestUtils.openNewBrowserWindow({private: true});
   let privateBrowser = privateWin.gBrowser.selectedBrowser;
-  privateBrowser.loadURI(testPageURL);
+  BrowserTestUtils.loadURI(privateBrowser, testPageURL);
   await BrowserTestUtils.browserLoaded(privateBrowser);
 
   await checkGeolocation(true, privateWin);

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_localStorage.js

@@ -13,8 +13,7 @@
   let browser = win.gBrowser.selectedBrowser;
   await BrowserTestUtils.browserLoaded(browser);
 
-  browser.loadURI(
+  BrowserTestUtils.loadURI(browser, "http://mochi.test:8888/browser/browser/components/privatebrowsing/test/browser/" +
-    "http://mochi.test:8888/browser/browser/components/privatebrowsing/test/browser/" +
     "browser_privatebrowsing_localStorage_page2.html");
   await BrowserTestUtils.browserLoaded(browser);
 

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_popupblocker.js

@@ -46,7 +46,7 @@ add_task(async function test() {
 
     }, {once: true});
 
-    aWindow.gBrowser.selectedBrowser.loadURI(testURI);
+    BrowserTestUtils.loadURI(aWindow.gBrowser.selectedBrowser, testURI);
   }
 
   let win1 = await BrowserTestUtils.openNewBrowserWindow();

browser/components/privatebrowsing/test/browser/browser_privatebrowsing_ui.js

@@ -32,7 +32,7 @@ function test() {
       aCallback();
     });
 
-    aWindow.gBrowser.selectedBrowser.loadURI(testURI);
+    BrowserTestUtils.loadURI(aWindow.gBrowser.selectedBrowser, testURI);
   }
 
   function openPrivateBrowsingModeByUI(aWindow, aCallback) {

browser/components/safebrowsing/content/test/browser_bug400731.js

@@ -40,7 +40,7 @@ function testMalware(data) {
 
   // Now launch the unwanted software test
   onDOMContentLoaded(testUnwanted);
-  gBrowser.loadURI("http://www.itisatrap.org/firefox/unwanted.html");
+  BrowserTestUtils.loadURI(gBrowser, "http://www.itisatrap.org/firefox/unwanted.html");
 }
 
 function testUnwanted(data) {
@@ -51,7 +51,7 @@ function testUnwanted(data) {
 
   // Now launch the phishing test
   onDOMContentLoaded(testPhishing);
-  gBrowser.loadURI("http://www.itisatrap.org/firefox/its-a-trap.html");
+  BrowserTestUtils.loadURI(gBrowser, "http://www.itisatrap.org/firefox/its-a-trap.html");
 }
 
 function testPhishing(data) {

browser/components/safebrowsing/content/test/browser_bug415846.js

@@ -32,7 +32,7 @@ function check_menu_at_page(url, testFn) {
     let dclPromise = ContentTask.spawn(browser, null, async function() {
       await ContentTaskUtils.waitForEvent(this, "DOMContentLoaded", false);
     });
-    browser.loadURI(url);
+    BrowserTestUtils.loadURI(browser, url);
     await dclPromise;
 
     let menu = document.getElementById("menu_HelpPopup");

browser/components/search/test/browser_426329.js

@@ -201,7 +201,9 @@ add_task(async function testShiftMiddleClick() {
 
 add_task(async function testRightClick() {
   preTabNo = gBrowser.tabs.length;
-  gBrowser.selectedBrowser.loadURI("about:blank");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:blank", {
+    triggeringPrincipal: Services.scriptSecurityManager.createNullPrincipal({}),
+  });
   await new Promise(resolve => {
     setTimeout(function() {
       is(gBrowser.tabs.length, preTabNo, "RightClick did not open new tab");
@@ -255,7 +257,9 @@ add_task(async function asyncCleanup() {
   while (gBrowser.tabs.length != 1) {
     gBrowser.removeTab(gBrowser.tabs[0], {animate: false});
   }
-  gBrowser.selectedBrowser.loadURI("about:blank");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "about:blank", {
+    triggeringPrincipal: Services.scriptSecurityManager.createNullPrincipal({}),
+  });
   await promiseRemoveEngine();
 });
 

browser/components/search/test/browser_abouthome_behavior.js

@@ -28,7 +28,7 @@ function test() {
     // load about:home, but remove the listener first so it doesn't
     // get in the way
     gBrowser.removeProgressListener(listener);
-    gBrowser.loadURI("about:home");
+    BrowserTestUtils.loadURI(gBrowser, "about:home");
     info("Waiting for about:home load");
     tab.linkedBrowser.addEventListener("load", function load(event) {
       if (event.originalTarget != tab.linkedBrowser.contentDocumentAsCPOW ||

browser/components/sessionstore/test/browser_394759_perwindowpb.js

@@ -16,7 +16,7 @@ const TESTS = [
 function promiseTestOpenCloseWindow(aIsPrivate, aTest) {
   return (async function() {
     let win = await BrowserTestUtils.openNewBrowserWindow({ "private": aIsPrivate });
-    win.gBrowser.selectedBrowser.loadURI(aTest.url);
+    BrowserTestUtils.loadURI(win.gBrowser.selectedBrowser, aTest.url);
     await promiseBrowserLoaded(win.gBrowser.selectedBrowser, true, aTest.url);
     // Mark the window with some unique data to be restored later on.
     ss.setWindowValue(win, aTest.key, aTest.value);

browser/components/sessionstore/test/browser_480893.js

@@ -33,7 +33,7 @@ add_task(async function() {
     ],
   });
 
-  browser.loadURI("about:sessionrestore");
+  BrowserTestUtils.loadURI(browser, "about:sessionrestore");
   await BrowserTestUtils.browserLoaded(browser, false, "about:sessionrestore");
   doc = browser.contentDocument;
 

browser/components/sessionstore/test/browser_491168.js

@@ -17,7 +17,10 @@ add_task(async function() {
 
   // Load a new URI with a specific referrer.
   let referrerURI = Services.io.newURI(REFERRER1);
-  browser.loadURI("http://example.org", { referrerURI });
+  browser.loadURI("http://example.org", {
+    referrerURI,
+    triggeringPrincipal: Services.scriptSecurityManager.createNullPrincipal({}),
+  });
   await promiseBrowserLoaded(browser);
 
   await TabStateFlusher.flush(browser);

browser/components/sessionstore/test/browser_async_window_flushing.js

@@ -97,7 +97,7 @@ add_task(async function test_remove_uninteresting_window() {
   // site.
   let tab = newWin.gBrowser.selectedTab;
   let browser = tab.linkedBrowser;
-  browser.loadURI(PAGE);
+  BrowserTestUtils.loadURI(browser, PAGE);
 
   await BrowserTestUtils.browserLoaded(browser, false, PAGE);
   await TabStateFlusher.flush(browser);
@@ -157,7 +157,7 @@ add_task(async function test_synchronously_remove_window_state() {
   // interesting.
   let newWin = await BrowserTestUtils.openNewBrowserWindow();
   let browser = newWin.gBrowser.selectedBrowser;
-  browser.loadURI(PAGE);
+  BrowserTestUtils.loadURI(browser, PAGE);
   await BrowserTestUtils.browserLoaded(browser, false, PAGE);
   await TabStateFlusher.flush(browser);
 

browser/components/sessionstore/test/browser_background_tab_crash.js

@@ -32,7 +32,7 @@ async function setupBackgroundTabs(testFn) {
   // foreground.
   let initialTab = gBrowser.selectedTab;
   let initialBrowser = initialTab.linkedBrowser;
-  initialBrowser.loadURI(NON_REMOTE_PAGE);
+  BrowserTestUtils.loadURI(initialBrowser, NON_REMOTE_PAGE);
   await BrowserTestUtils.browserLoaded(initialBrowser);
 
   // Open some tabs that should be running in the content process.

browser/components/sessionstore/test/browser_backup_recovery.js

@@ -73,7 +73,7 @@ add_task(async function test_creation() {
   // Open a second tab, save session, ensure that the correct files exist.
   info("Testing situation after a second write");
   let URL2 = URL_BASE + "?second_write";
-  tab.linkedBrowser.loadURI(URL2);
+  BrowserTestUtils.loadURI(tab.linkedBrowser, URL2);
   await promiseBrowserLoaded(tab.linkedBrowser);
   await TabStateFlusher.flush(tab.linkedBrowser);
   await SessionSaver.run();

browser/components/sessionstore/test/browser_broadcast.js

@@ -120,7 +120,7 @@ async function createTabWithStorageData(urls, win = window) {
   let browser = tab.linkedBrowser;
 
   for (let url of urls) {
-    browser.loadURI(url);
+    BrowserTestUtils.loadURI(browser, url);
     await promiseBrowserLoaded(browser);
     await modifySessionStorage(browser, {test: INITIAL_VALUE});
   }

browser/components/sessionstore/test/browser_closed_objects_changed_notifications_tabs.js

@@ -12,7 +12,7 @@ let notificationsCount = 0;
 async function openWindow(url) {
   let win = await promiseNewWindowLoaded();
   let flags = Ci.nsIWebNavigation.LOAD_FLAGS_REPLACE_HISTORY;
-  win.gBrowser.selectedBrowser.loadURI(url, { flags });
+  BrowserTestUtils.loadURI(win.gBrowser.selectedBrowser, url, { flags });
   await promiseBrowserLoaded(win.gBrowser.selectedBrowser, true, url);
   return win;
 }

browser/components/sessionstore/test/browser_closed_objects_changed_notifications_windows.js

@@ -14,7 +14,7 @@ let notificationsCount = 0;
 async function openWindow(url) {
   let win = await promiseNewWindowLoaded();
   let flags = Ci.nsIWebNavigation.LOAD_FLAGS_REPLACE_HISTORY;
-  win.gBrowser.selectedBrowser.loadURI(url, { flags });
+  BrowserTestUtils.loadURI(win.gBrowser.selectedBrowser, url, { flags });
   await promiseBrowserLoaded(win.gBrowser.selectedBrowser, true, url);
   return win;
 }

browser/components/sessionstore/test/browser_crashedTabs.js

@@ -134,7 +134,7 @@ add_task(async function test_crash_page_not_in_history() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
   await TabStateFlusher.flush(browser);
 
@@ -163,7 +163,7 @@ add_task(async function test_revived_history_from_remote() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
   await TabStateFlusher.flush(browser);
 
@@ -172,7 +172,7 @@ add_task(async function test_revived_history_from_remote() {
 
   // Browse to a new site that will cause the browser to
   // become remote again.
-  browser.loadURI(PAGE_2);
+  BrowserTestUtils.loadURI(browser, PAGE_2);
   await promiseTabRestored(newTab);
   ok(!newTab.hasAttribute("crashed"), "Tab shouldn't be marked as crashed anymore.");
   ok(browser.isRemoteBrowser, "Should be a remote browser");
@@ -202,7 +202,7 @@ add_task(async function test_revived_history_from_non_remote() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
   await TabStateFlusher.flush(browser);
 
@@ -211,7 +211,7 @@ add_task(async function test_revived_history_from_non_remote() {
 
   // Browse to a new site that will not cause the browser to
   // become remote again.
-  browser.loadURI("about:mozilla");
+  BrowserTestUtils.loadURI(browser, "about:mozilla");
   await promiseBrowserLoaded(browser);
   ok(!newTab.hasAttribute("crashed"), "Tab shouldn't be marked as crashed anymore.");
   ok(!browser.isRemoteBrowser, "Should not be a remote browser");
@@ -240,7 +240,7 @@ add_task(async function test_revive_tab_from_session_store() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
   let newTab2 = BrowserTestUtils.addTab(gBrowser, "about:blank", { sameProcessAsFrameLoader: browser.frameLoader });
@@ -248,10 +248,10 @@ add_task(async function test_revive_tab_from_session_store() {
   ok(browser2.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser2);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_2);
+  BrowserTestUtils.loadURI(browser, PAGE_2);
   await promiseBrowserLoaded(browser);
 
   await TabStateFlusher.flush(browser);
@@ -293,7 +293,7 @@ add_task(async function test_revive_all_tabs_from_session_store() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
   // In order to see a second about:tabcrashed page, we'll need
@@ -306,10 +306,10 @@ add_task(async function test_revive_all_tabs_from_session_store() {
   ok(browser2.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser2);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_2);
+  BrowserTestUtils.loadURI(browser, PAGE_2);
   await promiseBrowserLoaded(browser);
 
   await TabStateFlusher.flush(browser);
@@ -353,7 +353,7 @@ add_task(async function test_close_tab_after_crash() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
   await TabStateFlusher.flush(browser);
@@ -382,7 +382,7 @@ add_task(async function test_hide_restore_all_button() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
   await TabStateFlusher.flush(browser);
@@ -401,7 +401,7 @@ add_task(async function test_hide_restore_all_button() {
   let newTab2 = BrowserTestUtils.addTab(gBrowser);
   gBrowser.selectedTab = newTab;
 
-  browser.loadURI(PAGE_2);
+  BrowserTestUtils.loadURI(browser, PAGE_2);
   await promiseBrowserLoaded(browser);
 
   // Load up a second window so we can get another tab to show
@@ -440,7 +440,7 @@ add_task(async function test_aboutcrashedtabzoom() {
   ok(browser.isRemoteBrowser, "Should be a remote browser");
   await promiseBrowserLoaded(browser);
 
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   await promiseBrowserLoaded(browser);
 
   FullZoom.enlarge();

browser/components/sessionstore/test/browser_dying_cache.js

@@ -12,7 +12,7 @@ add_task(async function test() {
 
   // Load some URL in the current tab.
   let flags = Ci.nsIWebNavigation.LOAD_FLAGS_REPLACE_HISTORY;
-  win.gBrowser.selectedBrowser.loadURI("about:robots", { flags });
+  BrowserTestUtils.loadURI(win.gBrowser.selectedBrowser, "about:robots", { flags });
   await promiseBrowserLoaded(win.gBrowser.selectedBrowser);
 
   // Open a second tab and close the first one.

browser/components/sessionstore/test/browser_forget_async_closings.js

@@ -78,7 +78,7 @@ let forgetWinHelper = async function(forgetFn) {
   // Create a tab worth remembering.
   let tab = newWin.gBrowser.selectedTab;
   let browser = tab.linkedBrowser;
-  browser.loadURI(PAGE);
+  BrowserTestUtils.loadURI(browser, PAGE);
   await BrowserTestUtils.browserLoaded(browser, false, PAGE);
   await TabStateFlusher.flush(browser);
 

browser/components/sessionstore/test/browser_frametree.js

@@ -20,7 +20,7 @@ add_task(async function test_frametree() {
   is(await countNonDynamicFrames(browser), 0, "no child frames");
 
   // Navigate to a frameset.
-  browser.loadURI(URL_FRAMESET);
+  BrowserTestUtils.loadURI(browser, URL_FRAMESET);
   await promiseBrowserLoaded(browser);
 
   // The frameset has two frames.

browser/components/sessionstore/test/browser_history_persist.js

@@ -34,7 +34,7 @@ add_task(async function check_history_not_persisted() {
   });
 
   // Load a new URL into the tab, it should replace the about:blank history entry
-  browser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(browser, "about:robots");
   await promiseBrowserLoaded(browser);
   await ContentTask.spawn(browser, null, function() {
     let sessionHistory = docShell.QueryInterface(Ci.nsIInterfaceRequestor)
@@ -77,7 +77,7 @@ add_task(async function check_history_default_persisted() {
   });
 
   // Load a new URL into the tab, it should replace the about:blank history entry
-  browser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(browser, "about:robots");
   await promiseBrowserLoaded(browser);
   await ContentTask.spawn(browser, null, function() {
     let sessionHistory = docShell.QueryInterface(Ci.nsIInterfaceRequestor)

browser/components/sessionstore/test/browser_multiple_navigateAndRestore.js

@@ -13,9 +13,9 @@ add_task(async function() {
   ok(!browser.isRemoteBrowser, "Ensure browser is not remote");
   // Load a remote page, and then another remote page immediately
   // after.
-  browser.loadURI(PAGE_1);
+  BrowserTestUtils.loadURI(browser, PAGE_1);
   browser.stop();
-  browser.loadURI(PAGE_2);
+  BrowserTestUtils.loadURI(browser, PAGE_2);
   await BrowserTestUtils.browserLoaded(browser);
 
   ok(browser.isRemoteBrowser, "Should have switched remoteness");

browser/components/sessionstore/test/browser_privatetabs.js

@@ -22,7 +22,7 @@ add_task(async function() {
     tab2 = BrowserTestUtils.addTab(gBrowser);
     await promiseBrowserLoaded(tab2.linkedBrowser);
     await setUsePrivateBrowsing(tab2.linkedBrowser, true);
-    tab2.linkedBrowser.loadURI(URL_PRIVATE);
+    BrowserTestUtils.loadURI(tab2.linkedBrowser, URL_PRIVATE);
     await promiseBrowserLoaded(tab2.linkedBrowser);
 
     info("Flush to make sure chrome received all data.");

browser/components/sessionstore/test/browser_replace_load.js

@@ -32,6 +32,8 @@ var testSwitchToTab = async function(url, options) {
   ok(tab.hasAttribute("pending"), "tab is pending");
   await promise;
 
+  options.triggeringPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
+
   // Switch-to-tab with a similar URI.
   switchToTabHavingURI(url, false, options);
 

browser/components/sessionstore/test/browser_scrollPositions.js

@@ -125,7 +125,7 @@ add_task(async function test_scroll_background_tabs() {
   await checkScroll(tab, {scroll: SCROLL_STR}, "scroll on first page is fine");
 
   // Navigate to a different page and scroll there as well.
-  browser.loadURI(URL2);
+  BrowserTestUtils.loadURI(browser, URL2);
   await BrowserTestUtils.browserLoaded(browser);
 
   // Scroll down a little.

browser/components/sessionstore/test/browser_sessionHistory.js

@@ -76,7 +76,7 @@ add_task(async function test_pageshow() {
   await promiseBrowserLoaded(browser);
 
   // Create a second shistory entry.
-  browser.loadURI(URL2);
+  BrowserTestUtils.loadURI(browser, URL2);
   await promiseBrowserLoaded(browser);
 
   // Wait until shistory changes.
@@ -164,7 +164,7 @@ add_task(async function test_about_page_navigate() {
   // Verify that the title is also recorded.
   is(entries[0].title, "about:blank", "title is correct");
 
-  browser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(browser, "about:robots");
   await promiseBrowserLoaded(browser);
 
   // Check that we have changed the history entry.

browser/components/sessionstore/test/browser_sessionStorage.js

@@ -76,7 +76,7 @@ add_task(async function session_storage() {
     "sessionStorage data for mochi.test has been duplicated correctly");
 
   // Check that loading a new URL discards data.
-  browser2.loadURI("http://mochi.test:8888/");
+  BrowserTestUtils.loadURI(browser2, "http://mochi.test:8888/");
   await promiseBrowserLoaded(browser2);
   await TabStateFlusher.flush(browser2);
 
@@ -86,7 +86,7 @@ add_task(async function session_storage() {
   ok(!storage["http://example.com"], "storage data was discarded");
 
   // Check that loading a new URL discards data.
-  browser2.loadURI("about:mozilla");
+  BrowserTestUtils.loadURI(browser2, "about:mozilla");
   await promiseBrowserLoaded(browser2);
   await TabStateFlusher.flush(browser2);
 

browser/components/sessionstore/test/browser_switch_remoteness.js

@@ -27,7 +27,7 @@ add_task(async function() {
 
   // Load more pages than we would save to disk on a clean shutdown.
   for (let i = 0; i < MAX_BACK + 2; i++) {
-    browser.loadURI(URL + i);
+    BrowserTestUtils.loadURI(browser, URL + i);
     await promiseBrowserLoaded(browser);
     ok(browser.isRemoteBrowser, "browser is still remote");
   }
@@ -36,7 +36,7 @@ add_task(async function() {
   await countHistoryEntries(browser, MAX_BACK + 2);
 
   // Load a non-remote page.
-  browser.loadURI("about:robots");
+  BrowserTestUtils.loadURI(browser, "about:robots");
   await promiseTabRestored(tab);
   ok(!browser.isRemoteBrowser, "browser is not remote anymore");
 

browser/components/sessionstore/test/browser_undoCloseById.js

@@ -17,7 +17,7 @@ async function openAndCloseTab(window, url) {
 async function openWindow(url) {
   let win = await promiseNewWindowLoaded();
   let flags = Ci.nsIWebNavigation.LOAD_FLAGS_REPLACE_HISTORY;
-  win.gBrowser.selectedBrowser.loadURI(url, { flags });
+  BrowserTestUtils.loadURI(win.gBrowser.selectedBrowser, url, { flags });
   await promiseBrowserLoaded(win.gBrowser.selectedBrowser, true, url);
   return win;
 }

browser/components/shell/test/browser_1119088.js

@@ -58,7 +58,7 @@ function onPageLoad() {
 function test() {
   gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser);
   BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser).then(onPageLoad, false, "about:logo");
-  gBrowser.loadURI("about:logo");
+  BrowserTestUtils.loadURI(gBrowser, "about:logo");
 
   waitForExplicitFinish();
 }

browser/components/translation/test/browser_translation_exceptions.js

@@ -33,7 +33,7 @@ function test() {
     });
    });
 
-  gBrowser.selectedBrowser.loadURI("http://example.com/");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "http://example.com/");
 }
 
 function getLanguageExceptions() {

browser/components/translation/test/browser_translation_infobar.js

@@ -88,7 +88,7 @@ function test() {
     });
   });
 
-  gBrowser.selectedBrowser.loadURI("data:text/plain,test page");
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, "data:text/plain,test page");
 }
 
 function checkURLBarIcon(aExpectTranslated = false) {

browser/modules/test/browser/browser_SitePermissions_tab_urls.js

@@ -37,14 +37,14 @@ add_task(async function testTemporaryPermissionTabURLs() {
   await BrowserTestUtils.withNewTab("about:blank", async function(browser) {
     for (let uri of same) {
         let loaded = BrowserTestUtils.browserLoaded(browser, false, uri.spec);
-        browser.loadURI(uri.spec);
+        BrowserTestUtils.loadURI(browser, uri.spec);
         await loaded;
 
         SitePermissions.set(uri, id, SitePermissions.BLOCK, SitePermissions.SCOPE_TEMPORARY, browser);
 
         for (let uri2 of same) {
           let loaded2 = BrowserTestUtils.browserLoaded(browser, false, uri2.spec);
-          browser.loadURI(uri2.spec);
+          BrowserTestUtils.loadURI(browser, uri2.spec);
           await loaded2;
 
           Assert.deepEqual(SitePermissions.get(uri2, id, browser), {
@@ -58,7 +58,7 @@ add_task(async function testTemporaryPermissionTabURLs() {
 
     for (let uri of different) {
       let loaded = BrowserTestUtils.browserLoaded(browser, false, uri.spec);
-      browser.loadURI(uri.spec);
+      BrowserTestUtils.loadURI(browser, uri.spec);
       await loaded;
 
       SitePermissions.set(uri, id, SitePermissions.BLOCK, SitePermissions.SCOPE_TEMPORARY, browser);
@@ -70,7 +70,7 @@ add_task(async function testTemporaryPermissionTabURLs() {
 
       for (let uri2 of different) {
         loaded = BrowserTestUtils.browserLoaded(browser, false, uri2.spec);
-        browser.loadURI(uri2.spec);
+        BrowserTestUtils.loadURI(browser, uri2.spec);
         await loaded;
 
         if (uri2 != uri) {