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Download speed slows significantly with Firefox

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I have 40MPS dsl. My download speed significantly reduced (17-20MPS) with the latest 110.0.1 version. I traced the problem over the last week to Firefox. I thought I resolved it by deleting one of my 3 add-ons. Speed significantly increase after that. The next morning, it was slow again. I hibernate my computer over night. I closed Firefox and it speeded back up. I re-opened Firefox and the speed remains high so far, but 3-4 MPS slower than with Firefox closed. I do notice that Firefox is a very large memory hog. I also have a newer (6 months) laptop running Win11.

I have 40MPS dsl. My download speed significantly reduced (17-20MPS) with the latest 110.0.1 version. I traced the problem over the last week to Firefox. I thought I resolved it by deleting one of my 3 add-ons. Speed significantly increase after that. The next morning, it was slow again. I hibernate my computer over night. I closed Firefox and it speeded back up. I re-opened Firefox and the speed remains high so far, but 3-4 MPS slower than with Firefox closed. I do notice that Firefox is a very large memory hog. I also have a newer (6 months) laptop running Win11.