I have a 2009 MBP. Its battery still runs for about 2h, its optical drive worked the last time I tried, and it runs 10.13 which means the current Firefox ESR s

I have a 2009 MBP. Its battery still runs for about 2h, its optical drive worked the last time I tried, and it runs 10.13 which means the current Firefox ESR still works. I am planning to try OCLP on it and see if I can get Big Sur working. That's the last macOS that doesn't want a GPU that supports the Metal APIs, and it should run the latest Firefox and Chrome for a few years yet.