Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Is it possible to use multiple versions of Firefox on one machine (at different times).

  • 2 vastust
  • 16 on selline probleem
  • 1 view
  • Viimati vastas hurdingkatz

more options

I share my computer with the household.

I prefer Firefox 3.6.16

Another user would like to try Firefox 4.

Can we install v4 and keep v3 for me?

I share my computer with the household. I prefer Firefox 3.6.16 Another user would like to try Firefox 4. Can we install v4 and keep v3 for me?

All Replies (2)

more options

Do a custom install and install each version in its own program folder to use multiple Firefox versions.

Create a new profile exclusively for each Firefox version and create a desktop shortcut with -P "profile" appended to the target to launch each Firefox version with its own profile.

See these mozillaZine KB articles for information:

more options

I'm working my way through this information. I'll let you know how it goes after I give it a try.

Thanks,