Firefox very slow to open windows of 2nd and 3rd

When I click on the icon of Firefox Firefox / Google homepage opens in 2 seconds and I can select an item in the bookmarks.
If I try to open a second, it takes about 20 seconds, and the following applications take progressively longer.
It is a nuisance that I regularly need to have three or four points at the same time.

Try to clear your recent history and see if it works

Tags: Firefox

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