Bug 1625609 - Enable privileged about content process for all channels. r=jaws

Differential Revision: https://phabricator.services.mozilla.com/D68845

--HG--
extra : moz-landing-system : lando

browser/app/profile/firefox.js

@@ -487,17 +487,18 @@ pref("browser.tabs.showAudioPlayingIcon", true);
 // This should match Chromium's audio indicator delay.
 pref("browser.tabs.delayHidingAudioPlayingIconMS", 3000);
 
-#if defined(NIGHTLY_BUILD) && !defined(MOZ_ASAN)
 // Pref to control whether we use a separate privileged content process
 // for about: pages. This pref name did not age well: we will have multiple
 // types of privileged content processes, each with different privileges.
 // types of privleged content processes, each with different privleges.
-#if defined(MOZ_CODE_COVERAGE) && defined(XP_LINUX)
+#if defined(MOZ_CODE_COVERAGE) && defined(XP_LINUX) || defined(MOZ_ASAN)
   // Disabled on Linux ccov builds due to bug 1621269.
   pref("browser.tabs.remote.separatePrivilegedContentProcess", false);
 #else
   pref("browser.tabs.remote.separatePrivilegedContentProcess", true);
 #endif
+
+#if defined(NIGHTLY_BUILD) && !defined(MOZ_ASAN)
   // This pref will cause assertions when a remoteType triggers a process switch
   // to a new remoteType it should not be able to trigger.
   pref("browser.tabs.remote.enforceRemoteTypeRestrictions", true);