XUL File Type- The quick facts
What are XUL files and how to open them
Are you having problems opening an XUL file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your 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 4 different XUL openers which you will find listed below.
Last updated: May 31, 2022
Suggest another file format using extension XUL
While we know of one file format using the .XUL file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .XUL file.
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.