Cannot install Thunderbird

[MissPiggy]

I read this discussion a few days ago:

@rik

I still am learning on this, but when a “Preinstalled App” is removed, basically a “stub” is kept (you can find the app still under “All Apps > System apps”) but the actual app is gone (and there is nothing in the app menu). This is needed because as the app is part of the system image, if you just simply removed the app it would be restored when a system update is applied. So an empty placeholder identifying itself as the app somewhat prevents this. What I don’t know exactly is if after a new system update is applied if the “first run” then re-removes the app or if it is don’t a bit differently.

Maybe some of the devs can help out?