Hello,
I have Joplin desktop running on a couple of Linux systems, both using i3wm on NixOS. Certain operations that should be opening a link in a regular web browser, simply don't. On a Mac that I have available for example, in settings I can select Plugins, click the gear for "Manage your plugins", and then choose "Browse all plugins."
If I do the same on my Linux laptops, nothing visibly happens. Running xdg-open from a terminal does open links in Firefox, which is what I would expect in Joplin as well. I am not getting any error messages, just a lack of opening something in the browser that should be. Is there a configuration setting that Joplin checks on Linux?