Hacker News new | ask | show | jobs
by andrewf 5741 days ago
It's been a while since I've done this; but:

* Install your different Firefox versions in different locations (so one doesn't overwrite the other)

* Use "firefox -ProfileManager" to create at least one different 'profile', which is Firefox's user data set

* Use "firefox -P <profilename> -no-remote" to launch Firefox. -no-remote allows multiple Firefox instances to run on the same machine. -P profilename is necessary because you need a separate profile for each running instance.

More info at http://kb.mozillazine.org/Command_line_arguments
1 comments
Groxx 5740 days ago
Ooh, I'll have to try that. I've been using different profiles, but didn't know about the last step.

Still; mindboggling. Different version = different binary launched, which accesses a different and non-locked profile. Why the hell does it instead open a new window of the currently-running version?

As a heads-up to anyone considering this: Sync doesn't (currently) like multiple versions. 3.6.10 won't sync now that I've hooked up some 4 betas.

link