Hi, so is there a problem with using that much or that little. Hi, What is the issue that is causing problems with Firefox.

Also yes Youtube is having issues with too much ram consumption and screen sizes on Firefox. https://www.howtogeek.com/334594/stop-complaining-that-your-browser-uses-lots-of-ram-its-a-good-thing/ So if there is no problem with using that amount then there is no issue as Firefox is doing what it should be doing.

Please let us know if this solved your issue or if need further assistance.

Please : go to the Firefox 3 Bar Menu --> Options --> Privacy & Security panel and under Permissions check (put a tick in the box) the setting to Prevent Accessibility Services from accessing your browser.

Go to the 3 Bar Menu then Options --> General --> Performance and untick everything. change the recommended size lower then see how it runs. Note: 1 = No Multiprocessor = slow again. Try 2, try higher, go lower, find the sweet spot. Restart Firefox after making these changes please. Note : Hardware Acceleration is for Video Card, Monitor to see if remain off or to turn back on.

Please let us know if this solved your issue or if need further assistance.