Xul.dll is a set of data used in the “FireFox” browser to allow you to download and process numerous pages online. Unfortunately, it is also very likely that many problems cause several different errors to be revealed when trying to use Firefox. This thing is quite easy to fix, and although many people deal with it on their computer daily, it is probably fixed relatively quickly and easily. To know more tips about DLL errors, visit the Thetechhacker website.
Reinstall Your Browser
The first thing to do to fix this error is to reinstall Firefox. This will remove the application from your PC and eventually delete xul.dll with it. You need to download this installer and install the latest edition of Firefox on your system, which should update the xul.dll file.
Update the File
If it doesn’t work, you should try updating xul.dll by simply downloading a new copy of the Registry and then putting it on your computer. This can replace the old Registry using a new variant, which should correct the error you see.
Install an Antivirus
Once these steps are completed, you can also consider using an antivirus program to remove any of these virus infections that distort the xul.dll file. This is a quick and fairly easy process to do; all you need to do is download an antivirus program and have it scan your PC to remove any of those complaints that could damage your system.
Use a Registry Cleaner
You should also try a Registry Cleaner to solve this problem. One of the main reasons why Windows keeps getting errors in DLL files is how the “Registry” gets damaged or corrupted. The Registry contains a basic memory list of all DLL files on your PC (called “DLL path references”). It can be exactly what every application program on your system uses to load individual DLL files onto your system. This list gets corrupted regularly and prevents programs like Firefox from navigating to the necessary DLL files.