Xul.dll is a file used by the Mozilla FireFox web browser to help control the various forms of data transferred through the Internet. Although this file is crucial to helping this tutorial
your web browser run as quickly and reliably as possible, it’s often the case that it will continually cause errors because it’s either corrupt, damaged or misplaced on your system. If you are seeing errors caused by xul.dll, you need to be able to repair any problems that are causing them to appear, and this tutorial is going to show you exactly how to do that.
Typical Xul.dll errors will show like this:
This application has failed to start because xul.dll was not found. Re-installing the application may fix the problem
C:Program Filesmozilla Firefoxxul.dll is either not designed to run on WINDOWS or it contains an error. Try installing program again.
The reason why these errors show is all down to the way in which the file is continually being accidentally damaged and corrupted. This happens for a number of reasons, not least because the xul.dll file is continually being left when you update your FireFox browser. If you have the Xul.dll error on your system, you need to be able to repair it in the most effective way by ensuring the file is not damaged, as well as fixing any of the potential system issues that are leading the error to show.
The way to fix this error is to use reinstall FireFox on your PC. This is probably the easiest step to fixing the error because it will automatically take your FireFox installation and then replace all the files, settings and options it has on your system. To do this, you should first download the latest version of FireFox from the Internet, then save the setup file on your system. After you’ve done this, click Start > Control Panel > Add / Remove Programs and then remove the Firefox installation from your system. This will completely remove the program (and its files) from your PC, allowing you to quickly install the new one – which will place fresh copies of all the files you need on your system. 7 times out of 10, this will fix the various Xul.dll errors on your PC.