xpcom_compat.dll File Information
  • DLL File Name:xpcom_compat.dll
  • File Type:Win32 DLL
  • Product Name:Firefox
  • Developer:Mozilla Foundation
  • File Version:1.8.20051.11116
  • File Size:66.6KB (68203 bytes)
  • Language Code:Neutral
  • Character Set:Unicode
  • MD5 Checksum:abb8ffac12a66ce88aded84303f32e6d
  • Copyright:License: MPL 1.1/GPL 2.0/LGPL 2.1

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fix xpcom_compat.dll error

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Xpcom_compat.dll Errors and Solutions

xpcom_compat.dll is a module associated with Firefox from Mozilla Foundation.

The file xpcom_compat.dll is a 32bit Windows DLL module for Firefox software or other related programs. The file and the associated Firefox software was developed by Mozilla Foundation. The file was licensed as License: MPL 1.1/GPL 2.0/LGPL 2.1.

xpcom_compat.dll file is a critical component for the software to work properly and without any dll error messages. You may receive an error message like the ones below that indicates the file is not found, damaged, or the wrong version.

  • This application failed to start because xpcom_compat.dll was not found.
  • The file xpcom_compat.dll is missing or corrupted.
  • A required component is missing: xpcom_compat.dll. Please install the application again.
  • Error loading xpcom_compat.dll. The specified module could not be found.
  • The program can't start because xpcom_compat.dll is missing from your computer. Try reinstalling the program to fix this problem.
  • Xpcom_compat.dll is either not designed to run on Windows or it contains an error.

To fix the error, you need to copy the missing xpcom_compat.dll file to your system or replace the corrupted dll file with a working one by following the instructions below. The current version of dll file available on our site is 1.8.20051.11116 with a size of 66.6KB.

How to Install xpcom_compat.dll

You can download xpcom_compat.dll for free from the download section on this page. After you download the compressed file, unzip it to a convenient location on your computer. In order to fix dll related errors, you need to copy the .dll file to the installation folder of the application or game, or install .dll file directly to Windows (Windows XP, Vista, Windows 7, Windows 10).

Install DLL File to Program Folder

Copy the extracted xpcom_compat.dll file to the installation folder of the application or game.

Check if the problem is solved. If the problem persists or you are not sure which software is having problems, install the .DLL file directly to Windows.

Register DLL File Using Microsoft Regsvr

Copy the file to "C:\Windows\SysWOW64\" (32bit)

Copy the file to "C:\Windows\System32\" (64bit)

You can install the .dll file in both system folders without any problems. In order to complete this step, you must run the Command Prompt as administrator.

Open the Start Menu and before clicking anywhere, type "cmd" on your keyboard.

Right-click the "Command Prompt" search result and click the "Run as administrator" option.

Paste the following command into the Command Line window that opens up and press Enter key.

%windir%\System32\regsvr32.exe xpcom_compat.dll & %windir%\SysWoW64\regsvr32.exe xpcom_compat.dll

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Download xpcom_compat.dll
Version OS Size Language Download
1.8.20051.111 32bit 66.6KB Download

Please note : This is a free download. No guarantees or warranties are given or implied. Please download and install the file at your own risk...

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