Subject: icecat "mailto" handler does not work - and cannot be reconfigured by user

From: Jonathan Brielmaier <[email-masked]>
Date: Mon, 26 Oct 2020 17:39:46 +0100

This issue annoys me, so I searched for a workaround which I found :)

In Icecat go to about:preferences -> General -> Applications (only a
header): Set mailto to `Use other` and set it to
`/run/current-system/profile/bin/icedove`.

$ grep mailto
/gnu/store/3zxx08qfl9q6d9s80p58521y9x3ni3p1-icedove-78.3.3/share/applications/icedove.desktop
MimeType=x-scheme-handler/mailto;

That seems correct. xdg-open mailto:[email-masked] works for me always, so
it really seems a Icecat/Firefox thing...