Backed out changeset f4f7fa5023f3 (bug 1758540) for causing Fenix topcrashes and breaking UI tests.

mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/AccessibilityTest.kt

@@ -1298,6 +1298,9 @@ class AccessibilityTest : BaseSessionTest() {
     }
 
     @Test fun testRemoteAccessibilityFocusIframe() {
+        // TODO: Bug 1758540
+        assumeThat(sessionRule.env.isFission, equalTo(false))
+
         testAccessibilityFocusIframe(REMOTE_IFRAME);
     }
 
@@ -1331,6 +1334,9 @@ class AccessibilityTest : BaseSessionTest() {
 
     @Setting(key = Setting.Key.FULL_ACCESSIBILITY_TREE, value = "true")
     @Test fun testRemoteIframeTree() {
+        // TODO: Bug 1758540
+        assumeThat(sessionRule.env.isFission, equalTo(false))
+
         testAccessibilityFocusIframe(REMOTE_IFRAME);
     }
 

modules/libpref/init/StaticPrefList.yaml

@@ -221,11 +221,7 @@
 # the parent process.
 - name: accessibility.cache.enabled
   type: bool
-#ifdef ANDROID
-  value: true
-#else
   value: false
-#endif
   mirror: once
 
 #---------------------------------------------------------------------------