Mozilla/5.0 (X11; U; Linux i686; en-ca) AppleWebKit/531.2+ (KHTML, like Gecko) Safari/531.2+ Debian/squeeze/sid () Epiphany/2.30.2
..Blog sites identify my Epiphany as running on Debian, not Ubuntu.
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.3) Gecko/20100423 Ubuntu/10.04 (lucid) Firefox/3.6.3
..and that's stock Firefox.
The U does not mean Ubuntu.
Mozilla/5.0 (X11; U; Linux i686; en-ca) AppleWebKit/531.2+ (KHTML, like Gecko) Safari/531.2+ Debian/squeeze/sid () Epiphany/2.30.2
..Blog sites identify my Epiphany as running on Debian, not Ubuntu.
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.3) Gecko/20100423 Ubuntu/10.04 (lucid) Firefox/3.6.3
..and that's stock Firefox.
The U does not mean Ubuntu.