Adding new things to Firefox
Is there a way for me to make custom JavaScript code to add things, like a built-in music player, to Firefox? I think it would be pretty neat if users could code their own things to add to Firefox.
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Hi Isaac, What you are describing is the add-on system for Firefox. Mozilla has put out some great documentation about add-ons on their developer site if you'd like to start writing your own extension. Or, if you're feeling adventurous, you may be able to contribute a feature directly to the browser. See the contributing guide for developers to get started.