Firefox Profiles - shawfdong/hyades GitHub Wiki
Here we describe how to create and manage profiles in Firefox.
To create a new profile, we first start the Profile Manager of Firefox. Note: Before we start the Profile Manager, Firefox must be completely closed.
On a Mac, run the following in a Terminal window:
/Applications/Firefox.app/Contents/MacOS/firefox -p
On a 64-bit Windows machine, run the following in a CMD window:
"\Program Files (x86)\Mozilla Firefox\firefox.exe" -p
1. Click Create Profile... in the Profile Manager, to start the Create Profile Wizard.
2. Click Next and enter the name of the profile (e.g., maia).
3. To create the new profile, click Done.
4. Start the Profile Manager again, and make sure "Use the selected profile without asking at startup" is unchecked. In the future, Firefox will always launch the Profile Manager, and prompt us for the profile to use each time we start Firefox.
Sometimes we need to open multiple instances of Firefox at the same time, using different profiles. We can accomplish that by using the -no-remote option to start a new Firefox process (invisible to the already running process), along with the -p (or -P) option to select a different profile.
For example, if we already have an instance of Firefox running with the profile default and we want to launch another instance of Firefox using the profile maia, On Mac we can run:
/Applications/Firefox.app/Contents/MacOS/firefox -p maia -no-remote
On Windows;
"\Program Files (x86)\Mozilla Firefox\firefox.exe" -p maia -no-remote