It's pretty well hidden and involves quite a few steps. I think you should be able to follow the same steps as in this Firefox Nightly guide: https://www.ghacks

It's pretty well hidden and involves quite a few steps. I think you should be able to follow the same steps as in this Firefox Nightly guide: https://www.ghacks.net/2020/10/01/you-can-now-install-any-add-on-in-firefox-nightly-for-android-but-it-is-complicated/ https://www.ghacks.net/2020/10/01/you-can-now-install-any-ad...