Bug 1643606 - Remove remnants of the toolkit.cosmeticAnimations.enabled pref. r=Gijs,remote-protocol-reviewers,marionette-reviewers,extension-reviewers,whimboo

Differential Revision: https://phabricator.services.mozilla.com/D78462

browser/components/extensions/test/browser/browser_ext_browserAction_popup_resize.js

@@ -76,7 +76,3 @@ add_task(async function testBrowserActionMenuResizeStandards() {
 add_task(async function testBrowserActionMenuResizeQuirks() {
   await testPopupSize(false);
 });
-
-add_task(async function testTeardown() {
-  Services.prefs.clearUserPref("toolkit.cosmeticAnimations.enabled");
-});

browser/components/extensions/test/browser/browser_ext_browserAction_popup_resize_bottom.js

@@ -37,7 +37,3 @@ add_task(async function testBrowserActionMenuResizeBottomArrow() {
 
   await BrowserTestUtils.closeWindow(win);
 });
-
-add_task(async function testTeardown() {
-  Services.prefs.clearUserPref("toolkit.cosmeticAnimations.enabled");
-});

browser/components/extensions/test/browser/browser_ext_popup_select.js

@@ -114,7 +114,3 @@ add_task(async function testPopupSelectPopup() {
   BrowserTestUtils.removeTab(tab);
   await extension.unload();
 });
-
-add_task(async function testTeardown() {
-  Services.prefs.clearUserPref("toolkit.cosmeticAnimations.enabled");
-});

remote/test/puppeteer/src/Launcher.ts

@@ -665,9 +665,6 @@ class FirefoxLauncher implements ProductLauncher {
       // Disable first-run welcome page
       'startup.homepage_welcome_url.additional': '',
 
-      // Disable browser animations (tabs, fullscreen, sliding alerts)
-      'toolkit.cosmeticAnimations.enabled': false,
-
       // We want to collect telemetry, but we don't want to send in the results
       'toolkit.telemetry.server': `https://${server}/dummy/telemetry/`,
       // Prevent starting into safe mode after application crashes

testing/marionette/client/marionette_driver/geckoinstance.py

@@ -566,9 +566,6 @@ class DesktopInstance(GeckoInstance):
         # Start with a blank page by default
         "browser.startup.page": 0,
 
-        # Disable browser animations
-        "toolkit.cosmeticAnimations.enabled": False,
-
         # Bug 1557457: Disable because modal dialogs might not appear in Firefox
         "browser.tabs.remote.separatePrivilegedContentProcess": False,
 

testing/marionette/components/marionette.js

@@ -277,9 +277,6 @@ const RECOMMENDED_PREFS = new Map([
   ["startup.homepage_welcome_url", "about:blank"],
   ["startup.homepage_welcome_url.additional", ""],
 
-  // Disable browser animations (tabs, fullscreen, sliding alerts)
-  ["toolkit.cosmeticAnimations.enabled", false],
-
   // Prevent starting into safe mode after application crashes
   ["toolkit.startup.max_resumed_crashes", -1],
 ]);