Last time i tried to use pamac to build a package (ungoogled-chromium) it took 4 hours to get maybe 30% of the build) so i am a bit curious not to happen this again in case of Thunderbird.
Maybe v.78 will be out soon as stable? Upgrading Thunderbird 68 to 78
I have found following packages:
thunderbird-beta-bin 83.0b2-1 AUR
Standalone Mail/News reader - Bleeding edge binary version
thunderbird-beta 79.0b2-1 AUR
Standalone mail and news reader from mozilla.org - Bleeding edge version
But how to proceed so my mail and preferably also mail accounts, lightning calendar is saved not damaged and possibly migrated? It appears the data are in ~/.thunderbird
How to go about merging data from old to new instance or have two in parallel or such?