I'm running Windows 10 with Firefox 40.0.3 as my default browser. I'm running multiple Firefox profiles simultaneously, one for development and one for browsing. One of the profiles is set as
default. The issue is that whenever I, while having the
default profile window open, try to open a link from some other program, I see the following error message
Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window
Following screenshot shows the error message that pops up when I, e.g, click "More Skins" in Windows media player. This action is probably meant to open a new Firefox tab.
The same error message pops up when the
default profile is running and I try to launch Firefox again (by using its shortcut or Cortana).
I've just realized something that might be vital to resolving this issue. I've the
dev profile set as default but whenever I try to open a link from external app while having both profiles' windows open, it tries to open it in the instance running in other (
browsing) profile. When I go ahead and click the
close button, it display another error that states
Your Firefox profile cannot be loaded. It may be missing or inaccessible