Usage

1. download the bat file
2. put it into the same directory with firefox.exe
3. run the bat file
4. you can now notice a new profile is launched in the same directory
5. if you wish, check official document to migrate data from your previous profile
6. if you don't wanna bother asking each time:
   1. open the bat file in any text editor
   2. delete contents despite the last line
   3. change the variant profileName into the profile folder name you prefer