Report an issue - about cannot AllowMultipleInstances (with solving method provided)
Good afternoon,
(1) Background:
I have three portable Firefoxes working together.
Every month, I update the portable Firefoxes by deleted the old folders named "App"
and the old exe files named "FirefoxPortable.exe" , then download their new version
to replace them.
(2) Issue:
This time, the Firefoxes cannot MultipleInstances.
The "second opened Firefox" cannot launch itself.
When I open the second Firefox,
It just opens a "new Firefox windows" of the "first Firefox" instead.