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recently updated versions have memory leak

see below screen capture. I am always open 3 windows with totally about200 tabs, but usually 5~6 tabs per window opened all the time, and when a day passed, the PC became slow and found Firefox process consume at least 1GB of memory and up to 10GB。

see below screen capture. I am always open 3 windows with totally about200 tabs, but usually 5~6 tabs per window opened all the time, and when a day passed, the PC became slow and found Firefox process consume at least 1GB of memory and up to 10GB。
Attached screenshots

All Replies (1)

If you check the internal page about:processes can you figure out which sites are the memory hogs, or is it Firefox itself, or an extension?