Stable version of Fenix can install non-preview Android extensions from AMO

Describe the problem and steps to reproduce it:

It looks like it's possible to install any extension that supports Android on the stable version of Fenix by visiting the "/firefox/" version of the extension's AMO URL.

Android URL: https://addons.mozilla.org/en-US/android/addon/ipvfoo/
Firefox URL: https://addons.mozilla.org/en-US/firefox/addon/ipvfoo/

Visit https://addons.mozilla.org/en-US/firefox/addon/ipvfoo/ on the stable version of Firefox for Android (120.1.0, Build #2015989146).
Tap "Add to Firefox".

What happened?

The extension will installation will complete.

What did you expect to happen?

Installation should have been blocked ahead of general availability on December 14th.

Anything else we should know?

This issue was originally reported on the Mozilla Add-ons Discourse.

Note that visual artifacts in the attached screenshots appear to be caused by an Android emulator bug.

Screenshot of Firefox Nightly 122.0a1 (Build #2015991047) on the "firefox" version of the AMO page

Screenshot of Firefox Nightly 122.0a1 (Build #2015991047) on the "android" version of the AMO page

Screenshot of Firefox for Android 120.1.0 (Build #2015989146) on the "firefox" version of the AMO page

Screenshot of Firefox for Android 120.1.0 (Build #2015989146) on the "android" version of the AMO page

┆Issue is synchronized with this Jira Task

mozilla / addons