diff --git a/browser/components/extensions/test/browser/browser.ini b/browser/components/extensions/test/browser/browser.ini
index 76a8a846b568..760fd60c9b8d 100644
--- a/browser/components/extensions/test/browser/browser.ini
+++ b/browser/components/extensions/test/browser/browser.ini
@@ -175,7 +175,6 @@ skip-if = (verify && debug && (os == 'mac'))
 [browser_ext_popup_corners.js]
 [browser_ext_popup_focus.js]
 disabled = bug 1438663
-[browser_ext_popup_requestPermission.js]
 [browser_ext_popup_select.js]
 skip-if = debug || os != 'win' # FIXME: re-enable on debug build (bug 1442822)
 [browser_ext_popup_sendMessage.js]
diff --git a/browser/components/extensions/test/browser/browser_ext_popup_requestPermission.js b/browser/components/extensions/test/browser/browser_ext_popup_requestPermission.js
deleted file mode 100644
index 1cd20a932814..000000000000
--- a/browser/components/extensions/test/browser/browser_ext_popup_requestPermission.js
+++ /dev/null
@@ -1,43 +0,0 @@
-"use strict";
-
-add_task(async function test_popup_requestPermission_resolve() {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      browser_action: {
-        default_popup: "popup.html",
-      },
-      optional_permissions: ["<all_urls>"],
-    },
-
-    files: {
-      "popup.html": `<meta charset="utf-8"><script src="popup.js"></script>`,
-      "popup.js": async () => {
-        const success = await new Promise(resolve => {
-          browser.test.withHandlingUserInput(() => {
-            resolve(
-              browser.permissions.request({
-                origins: ["<all_urls>"],
-              })
-            );
-          });
-        });
-        browser.test.assertTrue(
-          success,
-          "browser.permissions.request promise resolves"
-        );
-        browser.test.sendMessage("done");
-      },
-    },
-  });
-
-  const requestPrompt = promisePopupNotificationShown(
-    "addon-webext-permissions"
-  ).then(panel => {
-    panel.button.click();
-  });
-  await extension.startup();
-  await clickBrowserAction(extension);
-  await requestPrompt;
-  await extension.awaitMessage("done");
-  await extension.unload();
-});
diff --git a/browser/modules/ExtensionsUI.jsm b/browser/modules/ExtensionsUI.jsm
index d6448a47241e..e0289cfadf2e 100644
--- a/browser/modules/ExtensionsUI.jsm
+++ b/browser/modules/ExtensionsUI.jsm
@@ -41,9 +41,6 @@ function getTabBrowser(browser) {
   while (browser.ownerGlobal.docShell.itemType !== Ci.nsIDocShell.typeChrome) {
     browser = browser.ownerGlobal.docShell.chromeEventHandler;
   }
-  if (browser.getAttribute("webextension-view-type") == "popup") {
-    browser = browser.ownerGlobal.gBrowser.selectedBrowser;
-  }
   return { browser, window: browser.ownerGlobal };
 }