Firefox Browser For Mac Os X 10.5.8

I really hate having to buy new macs every few years. Between the machines and the software it is a big investment and a whole lot of time setting things up and learning how to use it.
I usually keep my macs as long as I can. My only problem now is the browsers. Firefox, Chrome and Safari don't seems to want to support 10.5.8. At least FF and Safari run but there are some sites I visit that don't work well with those old versions and the new versions can't be installed on 10.5.8.
Any suggestions on a browser that will let my macs live a little longer?
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Firefox For Mac Os X 10.5.8

Firefox Download For Mac Os X 10.5.8

Firefox browser for mac os x 10.5.8 downloadFirefox

Firefox Browser

Firefox Browser for Desktop. Get the browser that respects your privacy automatically. On Windows, macOS or Linux. Download; Features; Release Notes. May 11, 2020 Mozilla released Firefox Quantum with a number of new technologies on board, a couple of years back, but now, the browser has matured to just being called Firefox Browser, and well, it’s definitely a great browser for macOS. First of all, Firefox adopts a multi-process approach similar to Chrome (i.e a new and more powerful engine) to reduce.