Despotic Machine

birdtray-config.json

Edit the following strings:

"advanced/tbcmdline": [
        "/usr/bin/flatpak-spawn",
        "--host",
        "flatpak",
        "run",
        "--branch=stable",
        "--arch=x86_64",
        "--command=betterbird",
        "--file-forwarding",
        "eu.betterbird.Betterbird",
        "@@u",
        "%u",
        "@@"
    ],
    "advanced/tbprocessname": "betterbird",
    "advanced/tbwindowmatch": "Betterbird",

In Birdtray under Advanced - Thunderbird command line - call Betterbird as follows:

/usr/bin/flatpak-spawn --host flatpak run --branch=stable --arch=x86_64 --command=betterbird --file-forwarding eu.betterbird.Betterbird @@u %u @@

BetterBird is great. I got it running via Birdtray under Cinnamon with some minor tinkering in the birdtray-config.json file.

As long as they continue to require a phone number they should stop pretending to care about users privacy.