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How to Fix Could Not Find the Mozilla Runtime Error?

Last Updated on November 23, 2022 by Rajeesh Nair 1 Comment

If you’re a frequent Mozilla Firefox user like me, I am sure that once in a while you must have encountered the “Could not find the Mozilla runtime error” on your PC. Well, this article is simply about recovering from the Mozilla runtime error and fixing the issue whenever your browser throws the error in the future.

Things were different before Mozilla Firefox came onto the scene. Earlier, we had to rely on the slow Internet Explorer, the default browser on Windows PC and those were some challenging days on the internet. However, Mozilla launched Firefox and things got simpler and faster for most of us.

Despite being one of the best web browsers on the internet today, Mozilla Firefox has its own vulnerabilities. Mozilla runtime error is one of them. Well, there’s nothing to worry about this issue because a simple fix can help you overcome it just like that.

Here in this article, we’ll show you how to solve Could not find the Mozilla runtime error in Windows operating system.

Page Contents

  • Why does “Mozilla runtime error” occurs?
  • A simple method to fix Firefox could not find the Mozilla runtime error
    • Step 1: Download the Latest Version of Firefox
    • Step 2: Delete Old Firefox Directory
    • Step 3: Install the Latest Version of Firefox
      • Over to you!

Why does “Mozilla runtime error” occurs?

Well, before we move on to the solution to fix could not find the Mozilla runtime error, it is important to understand the reason behind the occurrence of the Mozilla runtime error. This error occurs on two occasions:

  1. An update went wrong. Firefox browser offers regular updates that are automatically downloaded and installed on your PC. Sometimes, these updates are conflicted with existing programs such as security software and Firefox throws the could not find the Mozilla runtime error.
  2. The Firefox program is corrupted because of some malicious program or an incompatible browser plugin or add-on.

A simple method to fix Firefox could not find the Mozilla runtime error

How to fix mozilla runtime error

Oftentimes, it is experienced that when you open your Firefox browser using the icon on your desktop or taskbar, the program throws a popup box saying ‘Could not find the Mozilla runtime’ and doesn’t let you use the browser.

here’s a simple 3-step method to fix this Mozilla runtime error:

Step 1: Download the Latest Version of Firefox

First, we need to download the latest setup of Firefox to get started. Open any other web browser such as Internet Explorer or Google Chrome and download the latest Firefox version from its official website and save it on your desktop.

Since we’re not uninstalling the browser completely, no data loss will happen in this process.

Step 2: Delete Old Firefox Directory

Once you have downloaded the latest Firefox setup, go to OS installation drive (mostly C Drive ) > Program Files and find the Mozilla Firefox folder there. Quickly delete the folder without any second thoughts. Make you delete the folder from Recycle bin as well.

If you can not find the Mozilla Firefox folder in Program Files, consider checking it in the Program Files (x86) folder. It happens when you install 32-bit software on a 64-bit Windows machine.

Delete Mozilla Firefox folder

Step 3: Install the Latest Version of Firefox

Next, you need to begin the installation process of the latest Firefox using the previously downloaded Firefox setup.

That’s it. You can now use Mozilla Firefox without could not find the Mozilla runtime error. You will also be surprised to find that all your bookmarks, plugins, add-ons, and other browser data are still intact after the new installation.

Well, these browser data aren’t saved inside the Firefox folder located in the Program Files section. Hence, none of your important data is lost even after you delete that folder and install a fresh version of the browser. Most importantly, this will quickly fix the could not find the Mozilla runtime error and let you browse freely on Firefox.

Additional Resource: Learn how to download vcruntime140_1.dll file

Over to you!

So that’s how you can overcome could not find the Mozilla runtime error with one simple and quick fix. However, there could be other ways to solve this “could not find the Mozilla runtime” error or ensure that it never occurs in the future.

So, if you have any solution to get rid of the could not find the Mozilla runtime error, then feel free to let us know in the comments below.

#Browsers#Firefox#Mozilla#Windows
Posted inComputer

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Rajeesh Nair is a true Gizmofreak and an addictive movie buff. He blogs at LifeBlender.com – a lifestyle Blogzine that focuses on general life-related topics of the 21st Century.

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Comments

  1. Avatar for Ian LeckenbyIan Leckenby says

    November 7, 2017 at 4:57 PM

    Regarding “Mozilla runtime missing” error using Thunderbird on Windows 10 Pro:
    I have tried the above remedy several times, without any change. I have removed every entry to “Thunderbird” in my registry using RegEdit, and have ensured that Thunderbird is removed everywhere on my PC. I have shut down the PC and then re-booted. I have then installed Thunderbird using the latest version from the Mozilla website. Shut down and rebooted the PC: “Mozilla runtime is missing” appears once more on start up! What on earth is going on???
    Even when I had completely (I thought!) eradicated all reference to “Thunderbird” in my registry, and then doing a subsequent re-boot, I received another error message to say “Thunderbird.exe missing mozglue.dll”!!!
    This is just ludicrous. The actual mail program works fine after I click on “OK” to the “runtime missing” error….

    Reply

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