When I first open FF I know not open two tabs instead of one, how to fix this please

Mac desktop
When I first open firefox I know get two tabs opening
every time (it happened after hours of searching for the answer regarding
How to return to yahoo "classic mail") the second tab is yahoo help page , but as usual, it did not help. only other change
yesterday, it was an add-on that I was finally able to remove.

Make sure that you have not set multiple home pages.

Tags: Firefox

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