Did you really mean 27 or meant 37? Because 27 is more than a year old and not one of the long term support releases, so if you're using 27, you're exposing you

Did you really mean 27 or meant 37? Because 27 is more than a year old and not one of the long term support releases, so if you're using 27, you're exposing yourself to all sorts of exploits. If you really meant 27, then I can only guess you're trying to avoid the new theme (which started in 29, so you could have been using 28), and that's a poor reason to stay with an old unsupported browser. Upgrade to 36 and use https://addons.mozilla.org/firefox/addon/classicthemerestorer/ https://addons.mozilla.org/firefox/addon/classicthemerestore... instead.