XUL

XUL (/ˈzl/ ZOOL), which stands for XML User Interface Language, is a user interface markup language made by Mozilla. XUL is an XML dialect for writing graphical user interfaces, it lets developers write user interface elements in a way similar to web pages.

XUL
Paradigm(s)Declarative (markup language)
DeveloperMozilla Foundation
Major implementationsMozilla
Influenced byHTML, XML
Implementation languageC++
PlatformGecko
OSCross-platform
LicenseMPL
Usual filename extensions.xul
MIME type: application/vnd.mozilla.xul+xml
WebsiteOfficial documentation