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!

Hilfe durchsuchen

Vorsicht vor Support-Betrug: Wir fordern Sie niemals auf, eine Telefonnummer anzurufen, eine SMS an eine Telefonnummer zu senden oder persönliche Daten preiszugeben. Bitte melden Sie verdächtige Aktivitäten über die Funktion „Missbrauch melden“.

Learn More

need an older version

more options

Oops. I replaced my version of Firefox with the the newest version, but my OS X El Capitan version 10.11.6 does not support it. Now I can't browse with Firefox. How may I get the compatible version back?

Oops. I replaced my version of Firefox with the the newest version, but my OS X El Capitan version 10.11.6 does not support it. Now I can't browse with Firefox. How may I get the compatible version back?

Alle Antworten (1)

more options

Firefox is no longer supported for versions older than Mac OS 10.12.x but the older version is still available as long as you accept the risk of unpatched security vulnerabilities.

You need to download an older .dmg file from an archive server, after which the procedure is the same as described in the article:

Note: My first link is for U.S. English. If you prefer a different language/locale, use the .. link on that page to show the directory of local codes, then click into the relevant one.