I agree with the sibling comment, what you are describing sounds like you are running out of RAM. This happens to me with Firefox on a PC with 64GB of RAM and t

I agree with the sibling comment, what you are describing sounds like you are running out of RAM. This happens to me with Firefox on a PC with 64GB of RAM and the cursor gets janky and I have to wait until some poor process gets killed and the PC becomes interactive again and I can restart Firefox.