multiple Firefox (Portable) instances doesn't work using -no

[The developers] changed the -no-remote flag's behavior in a surprising, backward incompatible way. Before, it just meant start a new instance.

The -no-remote option is used for running multiple Firefox profiles at the same time. You are getting the Firefox is already running message because you are ...

Another way to start multiple instances of FF portable is to add AllowMultipleInstances=true to the FirefoxPortable.ini in the same folder as the .exe.

The -no-remote switch with the -P for Profilemanager switch is so you can start a second instance of Firefox. You cannot start another instance of Firefox with ...

You can add -no-remote to the command line to open another Firefox instance with its own profile and run multiple Firefox instances simultaneously.

Running firefox.exe with parameter -no-remote used to open a new instance. Since a couple of updates back this is no longer the case.

Using '-no-remote' will allow to open separate Firefox instances each with their own profile.

'No-remote' means don't talk to an existing Firefox, start a new instance. To be clear: on platforms where the -remote option doesn't work, -no-remote is ...

The -no-remote makes Firefox run as a different process, where as not using it makes it the same process.

Basically what no-remote did was limit the clutter on the taskbar and also made it easier to tell a certain profile is fully closed since it limited it to one ...