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|Developer(s)||Mozilla Foundation and community|
|Initial release||February 2006|
41.0.2 / October 15, 2015
41.0b9 / October 14, 2015
XULRunner is a packaged version of the Mozilla platform to enable standalone desktop application development. A browser isn't required to run these applications, as they have their own executable file. The application is written in XUL (XML User Interface Language) developed by Mozilla. It replaced the Gecko Runtime Environment, a stalled project with a similar purpose. The first stable developer preview of XULRunner was released in February 2006, based on the Mozilla 1.8 code base.
XULRunner is a "technology experiment", not a shipped product, meaning there are no "official" XULRunner releases, only stable builds based on the same code as a corresponding Firefox release.
XULRunner stores a variety of configuration data (bookmarks, cookies, contacts etc.) in internally managed SQLite databases, and even offer an add-on to manage SQLite databases.
||This section needs to be updated. (February 2016)|
All XUL-based applications like Mozilla Firefox, Mozilla Thunderbird, Nightingale, Songbird, Flickr Uploadr, SeaMonkey, Conkeror, Sunbird, Miro, Joost, and TomTom Home 2.0 run on XULRunner. Starting with version 3.0, Mozilla Firefox uses a "private" XULRunner, meaning the framework is installed locally in the application directory.
In addition, the XULRunner package provides access to ActiveX Control functionality previously found in a (now defunct) third-party ActiveX Control built off the Mozilla source code. Applications using this application programming interface (API) may function with XULRunner installed and registered.
In January 2014, dropping XULRunner support was discussed by Mozilla developers. In July 2015, Mozilla stopped supporting the development of XULrunner, and the community page has been taken down. As of the beginning of 2016, it had been dropped from the package database of most Linux distributions, including Gentoo, Debian, and Ubuntu.
XULRunner can still be installed separately, and many XULRunner-dependent apps can be switched over fairly easily. However, its disappearance has caused some dependent packages to be removed from package databases.
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