Whenever you see that message, that means that I've seen the already existing report and checked the website and I really can't see the warning unless I disable the extension.

That is valid for Firefox on Linux, Chrome, Opera and most other browsers. But in Firefox for Windows... that's another story. I have reported it to them but they don't do much, I can't do anything else.

Try switching to Chrome for a while - just for a while :) - and you'll see there are no cookie warnings on those same websites.