Bug 1751721 - Add Zoom to the OffscreenCanvas domain allowlist and turn it on for users. r=gfx-reviewers,lsalzman,jgilbert

This will allow users to use gallery view with the web client for Zoom
in Firefox.

Differential Revision: https://phabricator.services.mozilla.com/D136836

gfx/thebes/gfxPlatform.cpp

@@ -936,7 +936,7 @@ void gfxPlatform::Init() {
 
   if (XRE_IsParentProcess()) {
     nsAutoCString allowlist;
-    Preferences::GetCString("gfx.offscreencavas.domain-allowlist", allowlist);
+    Preferences::GetCString("gfx.offscreencanvas.domain-allowlist", allowlist);
     gfxVars::SetOffscreenCanvasDomainAllowlist(allowlist);
   }
 

modules/libpref/init/StaticPrefList.yaml

@@ -3465,7 +3465,7 @@
 
 - name: dom.workers.requestAnimationFrame
   type: RelaxedAtomicBool
-  value: false
+  value: true
   mirror: always
 
 - name: dom.workers.serialized-sab-access
@@ -5495,13 +5495,13 @@
 # Enable OffscreenCanvas based on the domain allowlist.
 - name: gfx.offscreencanvas.domain-enabled
   type: RelaxedAtomicBool
-  value: false
+  value: true
   mirror: always
 
 # Domains included in the allowlist.
 - name: gfx.offscreencanvas.domain-allowlist
   type: String
-  value: ""
+  value: "*.zoom.us"
   mirror: never
 
 - name: gfx.omta.background-color