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firefox --profile ~/FirefoxProfiles/person
→ This successfully initialized the profile. It is now fully working and ready.
Your portable profile is ready for backup & restore
Launch command (this is the only one you need now):
Bashfirefox --profile ~/FirefoxProfiles/person
Easy backup (one folder = everything)
Bash# Create backup (compressed)
tar -czf ~/person-profile-backup-$(date +%Y-%m-%d).tar.gz ~/FirefoxProfiles/person

# Or simply copy the folder to USB / external drive / cloud
cp -r ~/FirefoxProfiles/person /path/to/your/backup/
Restore on another PC/laptop

Copy the entire person folder to the new computer (e.g. into ~/FirefoxProfiles/person)
Run exactly the same command:Bashfirefox --profile ~/FirefoxProfiles/person

All bookmarks, passwords, extensions, history, etc. will be there.

Make it super easy to launch (recommended)
Add this alias so you can just type ffperson anytime:
Bashecho 'alias ffperson="firefox --profile ~/FirefoxProfiles/person"' >> ~/.bashrc
source ~/.bashrc
Now just type:
Bashffperson