Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

Get my older version back

  • 2 replies
  • 0 have this problem
  • 12 views
  • Last reply by James

more options

I was updating Firefox on my on my computer, Mac OS 10.11.6( I know, I know…). Now The current version of FF won’t run and I am unable to upgrade the operating system because it so old. Is there a way to figure out which version of FF I had? Its slightly overwhelming to look at the choices of older versions to download. Any help is appreciated. Been a FF supporter forever and love it!

I was updating Firefox on my on my computer, Mac OS 10.11.6( I know, I know…). Now The current version of FF won’t run and I am unable to upgrade the operating system because it so old. Is there a way to figure out which version of FF I had? Its slightly overwhelming to look at the choices of older versions to download. Any help is appreciated. Been a FF supporter forever and love it!

All Replies (2)

more options

Firefox 78.15.0 is the last version for Mac OS X 10.11 and you will no longer receive updates, so you are out of luck if you can't update your OS. Current releases require Mac OS X 10.12 or newer.

Firefox 78.15.0 on the Mozilla CDN server:

more options