You've run afoul of this: https://forums.factorio.com/viewtopic.php?t=101339
Horticular also had this bug in their beta and it took me forever to figure it out.
The user can fix by adding LD_PRELOAD="" %command% to their launch options, but you can fix this globally by unsetting that environment variable before making the call to open the user's browser.
This impacts the feedback form, the discord bug report button, and anything else that might try to open the browser.
Factorio Forums
When opening links from Prototype Explorer or any other link, it takes a lot of time until it is open in browser. By "very long" I mean a minute or…
I'm okay waiting for tobspr to see the bug. It's a really easy fix.