First question, what version of Firefox OS are you running, can you please mention what version of Gecko is listed in your Device Information in the Settings Menu. Second, javascript is enabled by default, however if this question is actually about the browser Firefox you can make sure its enabled from there: You can still access it from about:config or by installing an add-on. '''about:config''' # In the address bar, type "about:config" (with no quotes), and press Enter. # Click "I'll be careful, I promise" # In the search bar, search for "javascript.enabled" (with no quotes). # Right click the result named "javascript.enabled" and click "Toggle". JavaScript is now re-enabled. Thank you and I hope this helps!