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Firefox update ESR has killed my browser

Michael Clark
Michael Clark
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I use a 2009 Mac Mini running OS 10.11.6 dedicated for streaming. I was prompted to update Firefox to ESR which I did, replacing the older version of Firefox. The new version will not open.

It was the only browser I had. Can I undo the installation? Or download 78.15.0 somehow to restore the functionality of this Mac?

I use a 2009 Mac Mini running OS 10.11.6 dedicated for streaming. I was prompted to update Firefox to ESR which I did, replacing the older version of Firefox. The new version will not open. It was the only browser I had. Can I undo the installation? Or download 78.15.0 somehow to restore the functionality of this Mac?

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James (doing minimal support)
James (doing minimal support)
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If by ESR you mean the Firefox 115 ESR as that is only being served to macOS 10.12, 10.13, 10.14 (and Windows 7, 8, 8.1) OS users as it should not be getting served to macOS 10.11 users as they would get served the Firefox 78.15.0 ESR instead.

If your hardware allows you to update your macOS to at least 10.12 then you would be able to run the Firefox 115 ESR.


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