Is there a command-line argument that would force firefox.exe to launch a new process for a particular URL regardless of whether another instance of firefox is already running?
Is there a command-line argument that would force firefox.exe to launch a new process
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If you have a second profile (like ‘sidekick’), the following will launch a new Firefox process:
However, if that profile is already used by a current Firefox session, that will not work.
To create a new profile launch Firefox from the command line with the -P flag and create it.
The OP ykaganovich adds in the comments (in Oct. 2020, three years later):