Phew, things are looking pretty rough in that profile! I'd say the profile indicates that there are a lot of blob URLs around, and that Firefox isn't dealing with them very well. Can you go to about:memory, click Measure, and see which page or add-on has created all those blob URLs?
Bug 1981051 Comment 3 Edit History
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Uh oh, things are looking pretty rough in that profile! I'd say the profile indicates that there are a lot of blob URLs around, and that Firefox isn't dealing with them very well. Can you go to about:memory, click Measure, and see which page or add-on has created all those blob URLs?