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Dot on YouTube pages

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  • 1 has this problem
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  • Last reply by FredMcD

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I've lately noticed that when I watch some YouTube videos I get this white dot on the page for some reason, refreshing the page makes it disappear. What causes this?

I've lately noticed that when I watch some YouTube videos I get this white dot on the page for some reason, refreshing the page makes it disappear. What causes this?
Attached screenshots

Chosen solution

Solved it. The reason is an addon called "Imagus" That enlargens pictures with mouse hover.

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Chosen Solution

Solved it. The reason is an addon called "Imagus" That enlargens pictures with mouse hover.

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That was very good work. Well Done.