Conkeror [SEP] programming language
. Buffers can be cycled through using codice_7 to go to the next buffer or codice_8 to go to the previous one. codice_9 displays a list of the currently open buffers from which the user can choose a buffer using the up and down arrows.
Customization.
The Conkeror browser can be customized in many ways using JavaScript as the scripting language, much in the way that Emacs uses Emacs Lisp. Customizations can be as simple as rebinding keys, but can be more involved; for instance, writing new interactive commands.
Wine. Mozilla also uses it in their Thunderbird email-client.
Other web browsers using Gecko include GNU IceCat, Waterfox, K-Meleon, Lunascape, Portable Firefox, Conkeror, Classilla, TenFourFox.
Other products using Gecko include Nightingale, Instantbird and Google's picture-organization software Picasa (for Linux).
Gecko is also used by Sugar for the OLPC XO-1 computer. Gecko is used as a complete implementation of the XUL (XML User Interface Language). Gecko currently defines the XUL specification.