Hi coasty, Firefox has full javascript support built in - so there's no need to install anything extra. If webpages that need javascript aren't working properly for you, it could be that an addon/extension is causing this. Could you please try temporarily disabling any addons you have installed and let usmknow whether it works? There are instructions in the article below (under the "How do I update, change options or remove add-ons?" section). [[Find and install Add-ons on Firefox for Android]]