Revert "Bug 1963137 - Enable extensions.ml.enabled browser pref on all channels r=ngrato" for causing multiple failures

This reverts commit 440978fd41.

modules/libpref/init/all.js

@@ -1800,10 +1800,11 @@ pref("extensions.browser_style_mv3.supported", false);
 pref("extensions.browser_style_mv3.same_as_mv2", false);
 
 // Experimental Inference API
-pref("extensions.ml.enabled", true);
-
-// Local model management page enabled
-pref("extensions.ml.local_model_management", true);
+#ifdef NIGHTLY_BUILD
+  pref("extensions.ml.enabled", true);
+#else
+  pref("extensions.ml.enabled", false);
+#endif
 
 // Middle-mouse handling
 pref("middlemouse.paste", false);

toolkit/mozapps/extensions/internal/ModelHubProvider.sys.mjs

@@ -16,7 +16,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
 XPCOMUtils.defineLazyPreferenceGetter(
   lazy,
   "MODELHUB_PROVIDER_ENABLED",
-  "extensions.ml.local_model_management",
+  "browser.ml.modelHubProvider",
   false,
   (_pref, _old, val) => ModelHubProvider[val ? "init" : "shutdown"]()
 );

toolkit/mozapps/extensions/test/xpcshell/test_ModelHubProvider.js

@@ -11,7 +11,7 @@ ChromeUtils.defineESModuleGetters(this, {
 createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1");
 AddonTestUtils.init(this);
 
-const MODELHUBPROVIDER_PREF = "extensions.ml.local_model_management";
+const MODELHUBPROVIDER_PREF = "browser.ml.modelHubProvider";
 
 function ensureBrowserDelayedStartupFinished() {
   // ModelHubProvider does not register itself until the application startup