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Lower right-hand corner of Firefox window frame; small white square; green "S" and blue "P." Click = diagonal red line superimposed over letters, upper right to lower left. What is this? What's difference between line and no line?

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  • Last reply by TonyE

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Nothing appears when I superimpose the cursor over the white square. Next to it is a dark-gray lock-shaped icon which, if I superimpose the cursor over it, tells me if the site I'm on is authenticated. These icons are in the lower right-hand corner of the Firefox window frame just to the left of the three diagonal lines which are used to expand or shrink the window.

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That is not a built-in feature of Firefox, but will have been added by the SearchPreview add-on that you have installed. For details on what the add-on does see

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TonyE --

Thanks for your reply. I have no idea how SearchPreview got installed and will uninstall it as soon as I can figure out how.

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You're welcome

In case you have not already figured it out, see