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Popup windows displaying "f", "38", "27" are appearing any time I load a new page, along with a checkbox for "prevent page from displaying more messages". Not sure why.
Glad I'm not the only one. I think it's done now. Probably some debug code that got into the wild.
I got the same except instead of 38 it was 39 for me. But it is gone since i restarted my browser.
I got !, 10, & 11 myself...
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