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New window opens in firefox automatically

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A different window opens in Firefox like the image i uploaded it has no tabs no back and refresh option what is this and how to turn this off

A different window opens in Firefox like the image i uploaded it has no tabs no back and refresh option what is this and how to turn this off
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That is a popup window -- you can tell by the lack of normal controls. It might be generated by an ad in a page you visited, or by one of your add-ons. Do you have any Lenovo add-ons?