Add Thunderbird Android to Accrescent

[xUxSxExR]

Accrescent.app is a new, security-first appstrore for Android.

It uses minimum version pinning, signed metadata and more to ensure that users install a safe and verified version of the App. While it is not fully public yet, it works wepl and contains many known apps.

Among these are the security- and feature-enhanced Signal-Client "Molly", the hardened Firefox variant "Ironfox", the network geolocation collector "NeoStumbler" (to be used with BeaconDB, a MLS replacement) and more.

Accrescent is preinstalled on GrapheneOS and as such allows a full chain of trust from the OS root of trust to the installed apps. This is not possible with Obtainium (the only way to get official Thunderbird releases currently) or F-Droid.

Accrescent is also the only Android appstore that really updates in the background, without "privileged extensions" or other security problems. It just updates, unlike F-Droid-Basic (which does it kinda?) or Obtainium (which doesnt do it at all).

The UX is pretty good, and developers can upload their own signed APKs, giving them full control (unlike the Playstore).

Please add Thunderbird to Accrescent!

[Jon]

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