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Greyed out box in right top corner on some websites

Firefox Troubleshooting
James replied
sallyscott1
sallyscott1

On several site there's a greyed out box top right, which disables anything it covers, can't be got rid of, and makes using Firefox for these sites impossible. Help, please?? Thank you! (I'm having to use Chrome...)

On several site there's a greyed out box top right, which disables anything it covers, can't be got rid of, and makes using Firefox for these sites impossible. Help, please?? Thank you! (I'm having to use Chrome...)
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James
James
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Chosen Solution

I have seen a few posts about this here and at mozillaZine forums and it was due to the "Ghostery Tracker & Ad Blocker" extension.