Bug 1658878 - Isolate BlobURLs per agent-cluster - pref, r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D86968

browser/base/content/test/contextMenu/browser_contextmenu_loadblobinnewtab.js

@@ -135,6 +135,12 @@ async function openInNewTabAndReturnContent(selector) {
   return blobDataFromContent;
 }
 
+add_task(async function setup() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.partition.bloburl_per_agent_cluster", false]],
+  });
+});
+
 add_task(async function test_rightclick_open_bloburl_in_new_tab() {
   let blobDataFromLoadedPage = await rightClickOpenInNewTabAndReturnContent(
     "blob-url-link"

browser/components/originattributes/test/browser/browser_blobURLIsolation.js

@@ -109,4 +109,10 @@ for (let blobify of [page_blobify, worker_blobify]) {
   }
 }
 
-IsolationTestTools.runTests(TEST_PAGE, tests);
+async function setup() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.partition.bloburl_per_agent_cluster", false]],
+  });
+}
+
+IsolationTestTools.runTests(TEST_PAGE, tests, null, setup);

dom/file/ipc/tests/browser_ipcBlob.js

@@ -4,6 +4,12 @@ requestLongerTimeout(3);
 
 const BASE_URI = "http://mochi.test:8888/browser/dom/file/ipc/tests/empty.html";
 
+add_task(async function setup() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.partition.bloburl_per_agent_cluster", false]],
+  });
+});
+
 // More than 1mb memory blob childA-parent-childB.
 add_task(async function test_CtoPtoC_big() {
   let tab1 = await BrowserTestUtils.openNewForegroundTab(gBrowser, BASE_URI);

dom/file/tests/test_agentcluster_bloburl.js

@@ -6,12 +6,19 @@ const { CookieXPCShellUtils } = ChromeUtils.import(
   "resource://testing-common/CookieXPCShellUtils.jsm"
 );
 
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
 CookieXPCShellUtils.init(this);
 
 // Same agent cluster, all works fine: blobURLs can be opened.
 add_task(async () => {
   do_get_profile();
 
+  Services.prefs.setBoolPref(
+    "privacy.partition.bloburl_per_agent_cluster",
+    true
+  );
+
   const server = CookieXPCShellUtils.createServer({ hosts: ["example.org"] });
 
   let result = new Promise(resolve => {

dom/file/uri/BlobURLProtocolHandler.cpp

@@ -739,8 +739,9 @@ bool BlobURLProtocolHandler::GetDataEntry(
     return false;
   }
 
-  // Same agent-cluster only.
-  if (aAgentClusterId.isSome() && info->mAgentClusterId.isSome() &&
+  // BlobURLs are openable on the same agent-cluster-id only.
+  if (StaticPrefs::privacy_partition_bloburl_per_agent_cluster() &&
+      aAgentClusterId.isSome() && info->mAgentClusterId.isSome() &&
       !aAgentClusterId.value().Equals(info->mAgentClusterId.value())) {
     return false;
   }

dom/url/tests/test_bloburl_location.html

@@ -19,10 +19,14 @@ onmessage = function(e) {
   }
 };
 
-var ifr = document.createElement("iframe");
-document.body.appendChild(ifr);
+SpecialPowers.pushPrefEnv({
+  "set": [["privacy.partition.bloburl_per_agent_cluster", false]]
+}).then(() => {
+  var ifr = document.createElement("iframe");
+  document.body.appendChild(ifr);
 
-ifr.src = "data:text/html,<script>location=URL.createObjectURL(new%20Blob(['<script>parent.postMessage(location.pathname,\"*\");location.pathname=\"foo\";parent.postMessage(location.pathname,\"*\");<\/s' +'cript>'], {type:\"text/html\"}));<\/script>";
+  ifr.src = "data:text/html,<script>location=URL.createObjectURL(new%20Blob(['<script>parent.postMessage(location.pathname,\"*\");location.pathname=\"foo\";parent.postMessage(location.pathname,\"*\");<\/s' +'cript>'], {type:\"text/html\"}));<\/script>";
+});
 
 SimpleTest.waitForExplicitFinish();
 

modules/libpref/init/StaticPrefList.yaml

@@ -8766,6 +8766,11 @@
   value: @IS_NIGHTLY_BUILD@
   mirror: always
 
+- name: privacy.partition.bloburl_per_agent_cluster
+  type: RelaxedAtomicBool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
 # By default, the network state isolation is not active when there is a proxy
 # setting. This pref forces the network isolation even in these scenarios.
 - name: privacy.partition.network_state.connection_with_proxy

testing/web-platform/meta/workers/SharedWorker_blobUrl.html.ini

@@ -0,0 +1 @@
+prefs: [privacy.partition.bloburl_per_agent_cluster:false]