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xulrunner asi stáhnout odněkud půjde protože:

$ aptitude show xulrunner
Balík: xulrunner
Nový: ano
Stav: nenainstalovaný
Verze: 1.8.0.10-3ubuntu1
Priorita: volitelný
Sekce: universe/devel
Správce: Ubuntu MOTU Developers <ubuntu-motu@lists.ubun­tu.com>
Velikost po rozbalení: 934k
Závisí na: libbz2-1.0, libc6 (>= 2.5-0ubuntu1), libglib2.0-0 (>= 2.12.9), libgtk2.0-0 (>= 2.10.3), libidl0, libmozjs0d (>= 1.8.0.5), libnspr4-0d (>= 1.8.0.10), libreadline5 (>= 5.2), libstdc++6 (>= 4.1.2), libx11-6, libxt6, libxul0d (>=
1.8.0.1-9)
Navrhuje: xulrunner-gnome-support
Popis: XUL + XPCOM application runner
XULRunner is a single "gecko runtime" that can be used to bootstrap multiple XUL + XPCOM applications that are as rich as Firefox and Thunderbird.

XUL is Mozilla's XML based User Interface language that lets you build feature-rich cross platform applications. These applications are easily customized with alternative text, graphics and layout so that they can be readily branded or
localized for various markets. Web developers already familiar with Dynamic HTML (DHTML) will learn XUL quickly and can start building applications right away.

XPCOM is a cross platform component model. It has multiple language bindings and IDL descriptions so programmers can plug their custom functionality into the framework and connect it with other components.

Homepage: http://developer.mozilla.org/en/docs/XULRunner