Any issues lately with your network? When DNS is down or having issues, Firefox and forks take forever to start up.
Nothing special, I don't think that's the problem since the lag is at every launch and it takes something like a minute to appear.
I don’t think that’s the problem
Listen to the parent, this is almost certainly something to do with DNS (i.e. Firefox is not getting an answer for some reason, then timing out, then using maybe a backup DNS server; maybe there are multiple rounds of this). Who knows how your distro and that flatpak produce this interaction, but something is going on there.
If that's the issue, why it doesn't happen with all other flatpaks?
Don't know. Different runtimes? Different permissions?
Any issues lately with your network? When DNS is down or having issues, Firefox and forks take forever to start up.
Nothing special, I don't think that's the problem since the lag is at every launch and it takes something like a minute to appear.
Listen to the parent, this is almost certainly something to do with DNS (i.e. Firefox is not getting an answer for some reason, then timing out, then using maybe a backup DNS server; maybe there are multiple rounds of this). Who knows how your distro and that flatpak produce this interaction, but something is going on there.
If that's the issue, why it doesn't happen with all other flatpaks?
Don't know. Different runtimes? Different permissions?