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firefox.exe -no-remote doesn't open it's own instance anymore

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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. When I run firefox.exe -no-remote now only a new window within the same instance opens. Is it a bug or am I doing something wrong? How can I open a new instance?

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. When I run firefox.exe -no-remote now only a new window within the same instance opens. Is it a bug or am I doing something wrong? How can I open a new instance?

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I have fixed it by adding -profilemanager parameter: firefox.exe -no-remote -profilemanager

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I have fixed it by adding -profilemanager parameter: firefox.exe -no-remote -profilemanager