Backed out 3 changesets (bug 1669531, bug 1669530, bug 1669532) for causing bustages on StaticPrefList.yaml. CLOSED TREE

Backed out changeset d60a1c3a1070 (bug 1669532)
Backed out changeset 09c1330a1959 (bug 1669530)
Backed out changeset 1205b4638833 (bug 1669531)

modules/libpref/init/StaticPrefList.yaml

@@ -9988,11 +9988,7 @@
 
 - name: webgl.out-of-process
   type: RelaxedAtomicBool
-#if (defined(XP_LINUX) && !defined(MOZ_WIDGET_ANDROID)) || defined(XP_MACOSX) || defined(XP_WIN)
-  value: @IS_NIGHTLY_OR_DEV_EDITION@
-#else
   value: false
-#endif
   mirror: always
 
 - name: webgl.out-of-process.force