Bug 1405528 - Sideloaded XPIs should be disabled by default on Fennec as they are on Firefox Desktop. r=aswan

MozReview-Commit-ID: AtEJxWj211N

--HG--
extra : rebase_source : d2a2ac934725216ba272220b7f2689d98a3dc491

mobile/android/app/mobile.js

@@ -186,6 +186,10 @@ pref("xpinstall.whitelist.add", "https://addons.mozilla.org,https://testpilot.fi
 pref("extensions.langpacks.signatures.required", true);
 pref("xpinstall.signatures.required", true);
 
+// Disable add-ons that are not installed by the user in all scopes by default (See the SCOPE
+// constants in AddonManager.jsm for values to use here, and Bug 1405528 for a rationale).
+pref("extensions.autoDisableScopes", 15);
+
 pref("extensions.enabledScopes", 1);
 pref("extensions.autoupdate.enabled", true);
 pref("extensions.autoupdate.interval", 86400);