Bug 1683116: Disable remote canvas 2D for Release and late Beta. r=jrmuizel

Differential Revision: https://phabricator.services.mozilla.com/D100039

modules/libpref/init/StaticPrefList.yaml

@@ -4121,7 +4121,7 @@
 
 - name: gfx.canvas.remote
   type: RelaxedAtomicBool
-#if defined(XP_WIN)
+#if defined(XP_WIN) && defined(EARLY_BETA_OR_EARLIER)
   value: true
 #else
   value: false