I discovered two problems when setting up jitsi (ubuntu package) as a
handler e.g. for SIP: urls:
1. The showstopper:
/usr/share/applications/jitsi.desktop
current entry: Exec=jitsi
should be: Exec=jitsi %u
2. Jitsi only handles passed URLs when already started. I would suggest
buffering passed URLs until jitsi has connected all accounts and then
either connect to the URL or bugger the user with an error message if no
suitable account can be found.
all the best, Mark