Firefox has some memory management issue. "GPU" process keeps hogging memory

[krm]

Screenshot attached. GPU process keeps hogging memory when no tab has youtube, or any video..!

Edge is better, the tabs go to sleep, but in Firefox the sleep feature is missing, and "unload" tabs is broken I guess..

[StevieB]

I have long been a believer in that Firefox has serious memory issues, and opens way too many instances.