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!

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

older version of firefox

  • 1 reply
  • 1 has this problem
  • 15 views
  • Last reply by cor-el

lwesc87
lwesc87
more options

I have an older iMac desktop (system is 10.11.6). It can no longer be upgrade to newer systems. I had firefox on it, but am doing some updating of security info and saw that there was a newer version of Firefox than what I was using. I tried to upload it but it said I needed to discard the older version. So I did that. Then when I tried to upload the newer version, it said I couldn't because my system is not compatible (needs at least 10.12).

How can I put the older version back on my computer?

I have an older iMac desktop (system is 10.11.6). It can no longer be upgrade to newer systems. I had firefox on it, but am doing some updating of security info and saw that there was a newer version of Firefox than what I was using. I tried to upload it but it said I needed to discard the older version. So I did that. Then when I tried to upload the newer version, it said I couldn't because my system is not compatible (needs at least 10.12). How can I put the older version back on my computer?

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You need the last Firefox 78 ESR version (78.15.0). All Firefox releases on the Mozilla server: