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There are several DLL files which is used by Mozilla Firefox browser to function properly and among those DLL files Xul.dll is very important file which renders the various web-pages and its data when they are downloaded from the internet. But there is a problem with this Xul DLL file i.e. it is very prone to corruption and damage due to which several issues occur. These problems generally cause multitude of errors on Windows system which need to be fixed in order to fix the issues related to it. Some of the error messages that occur due to this DLL files are as follows –

This application has failed to start because xul.dll was not found. Re-installing the application may fix the problem

C:\Program Files\Mozilla Firefox\xul.dll is either not designed to run on WINDOWS or it contains an error. Try installing program again.

What are the causes behind Xul.dll Errors?

Some of the common reasons due to which this DLL error messages occur are as follows –

Invasion of virus and other infections in the computer has corrupted the file and made it un-readable.

Latest updates of Firefox have overwritten the previous files of PC.

Window’s registry is not clean and there is some problem in it.

How to fix Xul.dll error?

In order to resolve this issue user need to perform some steps, which are mentioned as under –

First user need to reinstall Mozilla Firefox so that the missing and lost XUL file should be freshly re-planted and renewed on the computer. After that restart the PC and then download the latest version of Firefox from its official website.

If the above mentioned step did not worked then user should try to replace the file manually from the system and also make sue that the computer should read the file to eliminate the error related to it.

In case the system is infected with viruses and other spyware’s, then user need to use an antivirus program to perform the complete scanning of the system and to eliminate all the threats which can cause the error message.

— As registry plays a vital role in proper functioning of the system and all its applications, cleaning the Windows registry will certainly help user to get rid of Xul.dll error effectively. It is because registry is the main database of Windows system which keeps the track of all the DLL files installed in the system. So keeping it clean and tidy will certainly help user to resolve this error messages.

So, just follow the above mentioned steps to fix Xul.dll error forever from the system.

Fix Xul DLL Error – Resolve "Xul DLL Not Found" Error!

Last Updated on October 4, 2022