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Firefox 37.0.2 download

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Running Firefox 37.0.2 worked fine on my old Mac G-5 with OSX 10.6.8, unable to upgrade OSX

How can I download this old version or, what alternatives are available for OSX 10.6.8?
Running Firefox 37.0.2 worked fine on my old Mac G-5 with OSX 10.6.8, unable to upgrade OSX How can I download this old version or, what alternatives are available for OSX 10.6.8?

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The very last release for 10.6.8, chronologically, is from April 2017:

https://archive.mozilla.org/pub/firefox/releases/45.9.0esr/mac/en-US/

If you prefer a language/locale other than U.S. English, click the .. link above the installer file name and you can choose a different folder.

If you need a version that has later functionality, this is the highest version for 10.6.8, from August 2016, however, it has had fewer security updates than the Extended Support Release of Firefox 45:

https://archive.mozilla.org/pub/firefox/releases/48.0.2/mac/en-US/

See also: Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8