| User Agent | Client Version | Operating System | OS Version | Language |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; de; rv:1.9.0.8) Gecko/2009032608 Firefox/3.0.8 Pict Firefox Plugin v. 1.0 | Plugin | Mac OS X | 10.5 | de |
| Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4 Pict Firefox Plugin v. 1.0 | Plugin | Windows | xp | en |
| Mozilla/5.0 (compatible; Firefox Addon; Windows XP 5.1) | Addon | Windows | xp | en |
| Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.3) Gecko/20100401 Firefox 7899040903 69990877703 (.NET CLR 3.5.30729) | 7899040903 | Windows | xp | de |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:2.0b1) Gecko/20100630 Firefox/4.0b1 | 4.0b1 | Mac OS X | 10.6 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:2.0b1) Gecko/20100630 Firefox/4.0b1 | 4.0b1 | Mac OS X | 10.5 | en |
| Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:2.0b1) Gecko/20100630 Firefox/4.0b1 | 4.0b1 | Windows | xp | en |
| Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9.3a5pre) Gecko/20100410 Firefox/3.7a5pre (Mac Community Build, ElFurbe) | 3.7a5pre | Mac OS X | 10.5 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.3a5pre) Gecko/20100524 Firefox/3.7a5pre | 3.7a5pre | Mac OS X | 10.6 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.3a1pre) Gecko/20100109 Firefox/3.7a1pre (Mac Community Build, ElFurbe) | 3.7a1pre | Mac OS X | 10.6 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.3a1pre) Gecko/20100130 Firefox/3.7a1pre (Mac Community Build, ElFurbe) | 3.7a1pre | Mac OS X | 10.6 | en |
| Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE; rv:1.9.3a1pre) Gecko/20090814 Firefox/3.7.1 | 3.7.1 | Windows | xp | de |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2b6pre) Gecko/20091230 Firefox/3.6b6pre (Mac Community Build, ElFurbe) | 3.6b6pre | Mac OS X | 10.6 | en |
| Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 | 3.6b5 | Mac OS X | 10.4 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 | 3.6b5 | Mac OS X | 10.6 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; zh-TW; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 | 3.6b5 | Mac OS X | 10.6 | zh-tw |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 | 3.6b5 | Mac OS X | 10.5 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 GTB6 | 3.6b5 | Mac OS X | 10.5 | en |
| Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; pl; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 | 3.6b5 | Mac OS X | 10.6 | pl |
| Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5 (.NET CLR 3.5.30729) | 3.6b5 | Windows | xp | en |