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[Kakarot]

My dear author, thank you for compiling the Firefox browser. I have a request, can you make a portable version of Firefox? This means that the personal configuration folder is in the same place as the main body of the software, instead of the C drive, which can be put into the U disk and used everywhere.

[Tete]

Hello. Thank you for using my build.
Actually, my builds already have the feature you mentioned. You can make my build portable mode by creating a file named tmemutil.ini in the same folder as firefox.exe in my build, and writing the following:

[General]
Portable=1

[Env]
MOZ_LEGACY_PROFILES=1

For more information, I would appreciate it if you could read the following:
http://www1.plala.or.jp/tete009/en-US/software.html#TMOZFAQ_INI