Definitely worse for me under FF25/linux with the autohinter. Kerning also seems to be worse in certain common cases ("ow"). Fortunately, I enforce my own font

Definitely worse for me under FF25/linux with the autohinter. Kerning also seems to be worse in certain common cases ("ow"). Fortunately, I enforce my own fonts on web pages, as I cannot stand the incredibly poor quality of most "web fonts". Proper hinting makes a world of difference for reading on a screen. If you really care for typography on your website, you should pay for a decent font, or use a common system font.