large amount of RAM

I quickly glanced the thread and don't see whether the results change when running in safe mode: Use Troubleshoot Mode in Firefox or in a separate, new, clean profile.

People forget the least optimized parts of the whole experience are a) the actual web content shown, b) any add-ons installed and touching that content.

So make sure the resource consumption is not actually caused by things like Tampermonkey scripts coming from random sources, or a YouTube tab that Google runs some crazy A/B test in sending the render down a loop of untested code on their side…

Anything interesting in Task Manager - see whether tabs or extensions are slowing down Firefox?

Being an open source, you can always pitch in, join the perf channels, and capture a profile on your side — and perhaps even trace the issue to some event, paint, timer etc. if you see anything out of the ordinary. See: https://profiler.firefox.com/docs/

Sorry, I’m not an expert, but I think jbr’s point about workers is probably the most useful clue here. If most of your tabs are web apps that keep background workers running, I’d guess those are using most of the memory, not Firefox itself. I might be wrong, but about:processes in Firefox shows which tab or process is using the most, so you could find the worst ones. Maybe also try tab unloading, or an add-on that suspends idle tabs, so the background ones free their memory. It’s also worth checking whether the high usage comes back in a fresh profile with the same sites, since that would point to the sites and not the browser. I asked gpt about some platform or site where you can compare the best components suited for your build and blogs or some kind of review , where you can know what you are getting , before getting it ... and it mentioned this popular site called "Etech Devices" , I don't know about it , i'm mentioning so if someone has experience please share..., this is kind of an answer and a question.