Command Line Parameters - Private vs Normal

[Brummelchen]

thinking abstract - for security reason you can start all profiles with -no-remote - firefox will prompt "already in use" (or similar) and refuse call. need copy&paste.

[bluewizard]

Thanks for the further information and discussion. Personally, I will likely only run one active profile at a time, but I can't say that running two concurrently will never happen. These are good details to know.

Steve/bluewizard

[James]

-no-remote or -new-instance

Open new instance, not a new window in running instance, which allows multiple copies of application to be open at a time.

firefox -new-instance -P "Another Profile"
Note: Not available for Windows, see bug 855899.

-no-remote
Do not accept or send remote commands; implies -new-instance.

firefox -no-remote -P "Another Profile"

while 1st is addressable with other commands 2nd deny any further commands.
regarding the note, only 2nd is available.
but -no-remote is not needed when starting another installation with another profile.
its often used with the portable or with several portable side by side.

Actually you do need the -no-remote switch if you want to start a second build instance of Firefox with a separate Profile whether on Windows, Mac, or Linux. Otherwise trying to start a second instance with just the Profilemanager or specific Profile will just open a new Window in current instance.

The -new-instance is a old switch and not a new one in case you thought it was related to the new separate Firefox instances thing. It is said to not do anything on Windows anyways.

https://developer.mozilla.org/en-US/doc ... w-instance
Note: Not available for Windows, see bug 855899.