Come on John... You know that you need to go shopping for something a wee bit newer. I also have a macbook pro running the same version from 2012. Time to hit ebay for a newer laptop.

THE END

Linux is my daily driver, but just out of curiosity I took a look at something from 2019. Have a look. Not sure what specs you want, but good luck in your search.

https://www.ebay.com/sch/i.html?_oaa=1&_fsrp=1&_from=R40&_nkw=macbook+pro&_sacat=0&_sop=15&Screen%2520Size=16%252D17%2520in&Release%2520Year=2017%7C2019&Processor=Intel%2520Core%2520i9%25209th%2520Gen%252E&_dcat=111422&rt=nc&LH_BO=1

If Firefox definitely no longer will be available for such an "outdated" computer, as of Feb. 1, 2026, what are other options? Thanks!

The last planned update for the older Firefox 115 ESR is Firefox 115.33.0esr on February 24 unless Mozilla decides before then to extend updates yet again for security/stability fixes.

https://support.mozilla.org/en-US/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support

Unless your hardware allows for a macOS update to 10.15 (ten.fifteen) or later then you can use the current Firefox 140.7.0esr and 147.0.1 Release.

There are no other options as Chrome/Chromium based browsers ended support for macOS 10.13 back in August 2023.