They are kind of in a conflicting state – one tries to run extra scripts and the other blocks them 😅. Just note that you should not use NoScript and Tampermonkey together. You can install any extension from my NuxFavs collection. You will see the list in standard 'Add-ons' menu. You will be able to install Tampermonkey and other add-ons I tested. The browser will shut down when you save changes (to apply them).Now go back to the menu and in the 'Advanced' section choose 'Custom Add-on collection'.Yes, you have discovered a hidden passage 🙂. This will enable developer mode (similar to how you enable it for Android). Open Firefox and choose: Menu (dots) -> Settings -> About Firefox (at the bottom).Install Firefox Nightly⁕ on your phone.Installing extensions from custom collection Using new Firefox, you need to do some extra steps, but once you know them, it is also easy. This was very easy in older Firefox versions. Tampermonkey is the one that allows to install user scripts (custom JavaScript for websites). Specifically – how to install Tampermonkey on Firefox. In this article I'll provide a know how on how to use browser extensions on mobile browser such as Firefox.