Gecko is Gecko

SeaMonkey Kazehakase Camino Firefox Galeon Mozilla Prism Fennec K-Meleon Flock

You are reading this because a user of your website is complaining that the browser user-agent sniffing you do breaks your site. This is because you sniff for "Firefox" or "Netscape" instead of "Gecko" in the UA. Firefox is not the only browser using the Gecko rendering engine from, and all of these browsers support the same web technologies as Firefox.

Read More about Gecko

How to feature-sniff instead of browser-sniff

How to properly sniff for a version of Gecko