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yes, if firefox gets ornery (with entirely too many tabs open all the time), i just kill some/all of the "FirefoxCP Web Content" processes (on macos) and then reload only the tabs i'm interested in at the moment. not the ideal level of granularity, but works ok in a pinch to reduce memory/cpu usage.

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This is something that bothers me a bit. On my PC memory usage spikes even after having tabs open for a short while.

I've recently shifted to Firefox and I noticed that after opening 10-15 tabs on about 3 separate firefox windows the memory usage is way higher than Chrome's. I have seen lesser memory usage on Chrome for way more tabs and windows.

I have very similar observations on my android phone as well. I've had 100+ chrome tabs open on my phone with no hiccups, but about 20-30 in, on Firefox, my entire phone slows down to a crawl and tabs start crashing etc.

Is it just me?

my impression is that all browsers are pretty greedy about memory for the first few dozen tabs. once you get to hundreds of tabs, the serious optimizations and compressions kick in so that the per-tab memory use curtails drastically. but i'm no expert in this area, just a user.

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