src/prefs.js: disable sandbox for non-ESR (MR 13)

https://support.mozilla.org/bm/questions/1236295#answer-1161622

Signed-off-by: Danct12 <danct12@disroot.org>

src/mobile-config-prefs.js

@@ -4,6 +4,7 @@
 // Set up autoconfig (we use it to copy/update userChrome.css into profile dir)
 pref('general.config.filename', "mobile-config-autoconfig.js");
 pref('general.config.obscure_value', 0);
+pref('general.config.sandbox_enabled', false);
 
 // Select a mobile user agent for firefox (same as tor browser on android)
 pref('general.useragent.override', 'Mozilla/5.0 (Android 9; Mobile; rv:78.0) Gecko/20100101 Firefox/78.0');