How To Fix Xul.dll Errors On Firefox
XUL.dll is a file used by the "XUL Runner" protocol, developed by Mozilla and shipped (most famously) with Firefox and Thunderbird. The XUL platform was developed as a way to provide a single base of functionality for the development of web-based applications.
The file XUL.dll delivers this functionality on the Windows system. It stands for XML User interface Language, and is used by the likes of Firefox and other XUL-powered apps. It can be the case that XUL.dll becomes corrupted, leading your system to show errors for it. If this is the case, you'll want to follow the steps outlined in this article to resolve any potential issues.