>As far as I know you can install any addons you want, you just have to create your own collection.

I'm also very interested in bypassing the mobile limitation. Does creating a custom collection require an account? Ive never seen the option and have tried everything to back to 2019-2020 Firefox plugin capabilities.

Update: For anyone in the same position, I just saw this solution in another comment. Its unfortunate that such basic functionality requires a whole user account.

>For reference, to work around mozilla's artificial restrictions, you have to use nightly. Once you activate the debug menu (about firefox > tap logo 5 times) there's the option to set a "custom add-on collection". You can make a custom collection on addons.mozilla.org using a firefox account. The two fields are the last two parts of the URL on your custom collection.