[Regression]: Restore Fennec web extension / add-on support

[jesus2099]

Steps to reproduce

Go to an add-on page:

• https://addons.mozilla.org/firefox/addon/violentmonkey/
• https://addons.mozilla.org/firefox/addon/styl-us/

And try to install them.

Expected behaviour

The add-on should be added to Firefox for Android Fenix, as they used to be all compatible with Firefox for Android 68.11.0 Fennec.

Actual behaviour

The install buttons are greyed out since Firefox for Android Fenix.

---

This is a new ticket replacing the Fennec Transition ticket #574 that was closed before fulfillment.

It is related to ticket #5315, that was restricted to partial support and closed.

There was ticket #13059, also closed before add-on support was actually restored.

Device name

Redmi 7

Android version

Android 9

Firefox release type

Firefox

Firefox version

89.0.10

Device logs

No response

Additional information

web extension / add-on
web extensions / add-ons

┆Issue is synchronized with this Jira Task

[jesus2099]

At least fixing #12719 would be the most important step.

[SpandexWizard]

Technically this isn't a bug, this is how they intend the add-ons to work. Unless I am mistaken they intend to, and have, completely replaced the addon web pages with the add-on manager for mobile, and you are supposed to select your add-ons through that. While I too would prefer that we could just go to the page and tell it to add them, that doesn't make this a bug. That part is working as intended.

[jesus2099]

Indeed it's not really a bug, it's a regression, but I could not find this type.
Maybe I should edit this to something like:

Cannot find Violentmonkey, Stylus (styl-us) nor other web extensions /add-ons in the add-on manager for mobile.

[cadeyrn]

There are really more than enough duplicate issues. Opening another one does not help. It makes it only more difficult to find the relevant discussions.

[benyaminl]

@kbrosnan any ETA for all extension to land on android? Or at least side loaded from Nightly? Thanks.

[plwt]

User feedback: https://support.mozilla.org/en-US/questions/1358594

[plwt]

User feedback: https://support.mozilla.org/en-US/questions/1359295

[plwt]

User feedback: https://support.mozilla.org/en-US/questions/1359321