| Yes, sorry. This is a Firefox bug and not user error. On my Linux system, this works with any other browser I try. It only fails with Firefox. If this is user error, it seems every other browser handles user errors much better. - Firefox: First window is open, running `firefox URL` from the other terminal hangs for 15-20 seconds and then shows the popup "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile.". No new tabs or windows are spawned. - Chromium: First window is open, running a `chromium URL` command from the other terminal opens a new tab on the existing window. - Microsoft Edge: First window is open, running a `microsoft-edge-stable URL` command from the other terminal opens a new tab on the existing window. - Ladybird: First window is open, running `ladybird` in the other terminal opens a new ladybird window. - Emacs/eww: First window is open, running `emacs --eval '(eww "example.com")'` on another terminal opens a new browser window. - Netsurf: First window is open, running `netsurf URL` from the other terminal opens a new netsurf window. - Dillo: First window is open, running `dillo URL` from the other terminal opens a new dillo window. - Links/XLinks: First window is open, running `xlinks -G URL` from the other terminal opens a new links window. You can see a clear pattern. Got any other browsers that refuse to run with a message like that? Or is this not a fault of Firefox, and something super extra that everything from other mainstream browsers to more obscure ones somehow handle for the user? |