XUL File

What are XUL files and how to open them

Are you having problems opening an XUL file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your XUL files.

What is an XUL file?

An .XUL file is a Mozilla XML User interface Language file.

Files with the .xul extension are most commonly associated with the Mozilla Firefox Internet browser. The XUL files are XML user interface files. The XUL file format was created to make it easier to develop the Mozilla Firefox browser. Other Web browsers that are based on the Gecko engine also use the XUL file format.

How to open XUL files

Important: Different programs may use files with the XUL file extension for different purposes, so unless you are sure which format your XUL file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested four different XUL openers which you will find listed below.

Last updated: May 31, 2022

Various apps that use files with this extension

These apps are known to open certain types of XUL files. Remember, different programs may use XUL files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about XUL file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.