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!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Firefox browser for Mac 10.11.6 assistance please

  • 1 reply
  • 0 have this problem
  • 1 view
  • Last reply by James

more options

I have an mid 2007 IMac running El Capitan 10.11.6 I replaced my old Firefox version with a newer incompatible one and now I can’t recover the old version of Firefox. All my bookmarks and saved data was on that older version. Can anyone help me find the most current version of Firefox for my Mac? Thanks!

I have an mid 2007 IMac running El Capitan 10.11.6 I replaced my old Firefox version with a newer incompatible one and now I can’t recover the old version of Firefox. All my bookmarks and saved data was on that older version. Can anyone help me find the most current version of Firefox for my Mac? Thanks!

All Replies (1)

more options

The most current version of Firefox you can run on Mac OS X 10.9, 10.10, 10.11 is Firefox 78.15.0esr as Firefox 79.0 and later requires Mac OS X 10.12 (ten.twelve) at minimum.

Firefox 78.15.0esr.dmg https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/en-US/ other locals are at https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/

https://support.mozilla.org/en-US/kb/firefox-mac-osx-users-esr

Modified by James