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what is icon on toolbar with red circle and yellow triangle with exclamation in it?

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On top right of my Firefox Browser, there is a red circle (opened slightly on top of circle) with a red shape in the center of it. There is a yellow triangle on the bottom of that circle with a black exclamation point in it. When I hove my mouse over it there is what appears to be chinese language that shows up. I have right clicked and removed it from the toolbar but it remains on the toolbar. What is this, and how to I get rid of it?

On top right of my Firefox Browser, there is a red circle (opened slightly on top of circle) with a red shape in the center of it. There is a yellow triangle on the bottom of that circle with a black exclamation point in it. When I hove my mouse over it there is what appears to be chinese language that shows up. I have right clicked and removed it from the toolbar but it remains on the toolbar. What is this, and how to I get rid of it?

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You can check for recently installed suspicious or unknown extensions.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window