[Users] Clicking a link in claws-mail opens it in default browser after a very long wait

[Removed GDPR]

Thanks Andrej,

It seems indeed the culprit is xdg-open as it takes too long. I have
just shared my findings in the bug report on openSUSE which I had
open:

https://bugzilla.opensuse.org/show_bug.cgi?id=1080766#c7

-- 
George