I think we need "Gentoo" in firefox useragent string Old useragent example: Mozilla/5.0 (X11; U; Linux x86_64; rv:1.9.2.8) Gecko/20100804 Gentoo Firefox/3.6.8 New useragent: Mozilla/5.0 (X11; Linux x86_64; rv:2.0) Gecko/20110424 Firefox/4.0 Reproducible: Always
useragent is not even valid anymore, was drop'd upstream due to security concerns.