I currently have over 1380 tabs open in firefox 52 ESR (over 4 windows). Oh god, it's terrible. Very slow and unresponsive, CPU usage is typically 60+% when idl

I currently have over 1380 tabs open in firefox 52 ESR (over 4 windows). Oh god, it's terrible. Very slow and unresponsive, CPU usage is typically 60+% when idle. I restart firefox every couple days (which takes many minutes) to keep CPU and memory usage down, by causing all tabs to be unloaded. (As an example, right now at 5.2GB resident, with only a small percentage of tabs loaded). I've been trying to kick the habit. I also have several other profiles and other computers. Probably adds to 5000 tabs all in all. I use All Tabs Helper to help jump between tabs. Finding tabs is hopeless without it. ATH also has features like mass closing tabs or unloading them. I wish it had a way to bookmark tabs, which I would use to close most of my tabs. So, I'm very glad to hear this. Time to switch off ESR.