Windows users face a lot of errors due to the incompatibility of software or applications. And so today we are going to discuss an error which reads Couldn’t load XPCOM. The error pops up as a result of incompatibility of the features of the web browser with Windows.

Aug 29, 2017 - 1 Answer. Couldn't load XPCOM Firefox How to Fix Firefox Error when Mozilla Firefox is unable to open and give you error message Couldn't load XPCOM. The only solution to fix this error is to Complete Uninstall delete mozilla firefox entries from Registry, and c drive and then do a fresh Install.

Mozilla Firefox has been the second most used web browser after Google Chrome. Mozilla comes up with regular updates for Firefox, but sometimes these updated features prove to be incompatible with the Operating system due to which the “Couldn’t load XPCOM” error occurs. But you can fix the error easily with some simple methods.

Check them out here. Contents • • • • • • • • What is XPCOM in Mozilla? XPCOM stands for Cross Platform Component Object Model. This cross-platform component model by Mozilla makes the environment of the application like an actual framework.

The software developer gets the following features from this development environment • File abstraction • Component management • Memory management • Object message passing While running your Mozilla Firefox, if you are facing the error related to XPCOM, then you are at the right page. Keep reading the article to gather more information about the topic. What Causes “Couldn’t Load XPCOM” Firefox Error? Mozilla Firefox has been the favorite browser of web developers as it comes with various extensions that support development. But sometimes it faces fails as a result of the introduction of new features.

But there are several methods by which you can fix the errors including couldn’t load XPCOM Windows error. But before moving on to the various fixes, let us have a look at the reasons that lead to such an error. • Due to Windows update • Corrupt Firefox’s profile folder • Virus attack • Installation of third party extension How to Fix Couldn’t Load XPCOM Firefox Error? As discussed above the XPCOM Firefox error occurs when you try to run Mozilla Firefox after a Windows update.

And the situation becomes worse when you don’t have any backup. But don’t worry as there are some ways by which you can fix the issue. Here are 5 working solutions to solve “Couldn’t load XPCOM” error. Solve Couldn’t load XPCOM using Firefox in Safe Mode The first method that you can try to fix the error is to open Mozilla Firefox in Safe Mode. For this, follow the given steps- Step 1: Hold the shift key down and then to open the Mozilla Firefox application, double click it. Step 2: Now select the Start in Safe Mode option.

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Step 3: If the Firefox application starts without any error in Safe Mode then the Firefox extensions installed might be the reason behind the error. And so disable the installed Ad-on one after the other, close and restart Firefox normally. Follow these steps to discover the plugin leading to the problem. To disable the extensions and Firefox plugins, follow the given steps. Step 1: Click on the three horizontal lines at the top right corner of the home page.

Then select Add-ons. Step 2: Now disable the Add-ons installed from the Extensions pane. Then restart the application normally to discover the extension causing the error. Step 3: After you get to know the root of the problem, it is advised that you remove the extension completely, provided you run the application in Safe Mode. After disabling the Add-ons and the extensions, check if the error still persists. If yes, then you can try the next method.

Solve XPCOM loading error by using Fresh Firefox The next method that you can apply to fix Couldn’t load XPCOM Firefox error is uninstalling, reinstalling and then upgrading the web browser to the latest version. For this method, you will require another web browser like Internet explorer or Google Chrome.

Step 1: Firstly uninstall Mozilla Firefox completely from your device. Removal of the application means that you remove everything that was related to it. You can complete this step either from Registry Editor or take help of some uninstaller like Iobit. • Uninstall Firefox • Remove the Registry entries • Delete from Program files • Remove entries from the AppData folder • Removal from the Program data folder Step 2: After uninstalling Mozilla Firefox, make sure you delete the Mozilla folder in the Roaming folder from AppData. Step 3: Now download the latest version of Mozilla Firefox from web browser like Internet Explorer and install it on you device.