1, right click on the desktop of the Firefox browser icon, choose to open properties;
2, in the Shortcut tab, in the Target column to add "-no-remote-profilemanager", note that-no before a space,-remote and-profilemanager also have a space between, and then click OK;
3, return to the desktop double click to open Firefox browser, will pop firefox-select User profile, then you can create a profile, rename the configuration file or delete the configuration file as needed;
4, click to create a profile, will pop up to create a Profile Wizard, click Next;
5, enter the custom profile name, click "Select Folder", select the relevant user data to save the folder, click to complete to generate configuration files;
6, through the above methods to produce a number of user profiles, you can later open the Firefox browser, select the desired configuration user and start it.