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Tried to update Firefox, but my system is no longer supported

cygnetonline
cygnetonline

I naively tried to update my Firefox software, but then when I tried to open it, I got a message saying my system is too old. I have OS X El Capitan Version 10.11.6. I gather you can download an older version of Firefox, but the directory is rather confusing, I don't know which option I need. Any help would be gratefully received, thank you!

I naively tried to update my Firefox software, but then when I tried to open it, I got a message saying my system is too old. I have OS X El Capitan Version 10.11.6. I gather you can download an older version of Firefox, but the directory is rather confusing, I don't know which option I need. Any help would be gratefully received, thank you!

Chosen solution

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

The most updated version you can run on macOS 10.11.x is Fx 78.15esr

https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/en-US/ other locales at https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/

Fx 79.0 and later has required mac OS 10.12 or later to run. https://www.mozilla.org/firefox/79.0/system-requirements/ https://www.mozilla.org/firefox/94.0/system-requirements/

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James (On Leave)
James (On Leave)
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Chosen Solution

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

The most updated version you can run on macOS 10.11.x is Fx 78.15esr

https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/en-US/ other locales at https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/

Fx 79.0 and later has required mac OS 10.12 or later to run. https://www.mozilla.org/firefox/79.0/system-requirements/ https://www.mozilla.org/firefox/94.0/system-requirements/

Modified by James (On Leave)

cygnetonline
cygnetonline Question owner

Thank you so much for your help.