Issues with W3C Validator icons Rated 4 out of 5 stars

I'm not 100% sure I should blame Favicon Picker 3 but I often get a wrong tab favicon when I validate HTML with the HTML validator. For instance, I see a big red box even if the code is valid. The W3C validator embeds favicons in the page HTML ( ) and the icon *is* correct. Weird...

This review is for a previous version of the add-on (0.4.0.5).