You don't need to publish the extensions, but you need to choose the extensions that you want to make available to Firefox. The instructions are here: https://

You don't need to publish the extensions, but you need to choose the extensions that you want to make available to Firefox. The instructions are here: https://blog.mozilla.org/addons/2020/09/29/expanded-extension-support-in-firefox-for-android-nightly/ https://blog.mozilla.org/addons/2020/09/29/expanded-extensio... The stable version of Fennec F-Droid (a fork of Firefox for Android) also supports custom extensions through this method if you don't want to use Firefox Nightly: https://f-droid.org/en/packages/org.mozilla.fennec_fdroid/ https://f-droid.org/en/packages/org.mozilla.fennec_fdroid/