Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox no longer works after uninstalling Mozilla VPM

rickedelson
rickedelson
more options

I uninstalled Mozilla VPN and then it got a runtime error. After trying to refresh Firefox I was forced to do an uninstall and clean reinstall. However now it doesn't even load. Fortunately Chrome is still working so I can get online and ask this question: how do I do a full reinstall to get a browser that loads? I'll be happy to run any diagnostics that I can.

I uninstalled Mozilla VPN and then it got a runtime error. After trying to refresh Firefox I was forced to do an uninstall and clean reinstall. However now it doesn't even load. Fortunately Chrome is still working so I can get online and ask this question: how do I do a full reinstall to get a browser that loads? I'll be happy to run any diagnostics that I can.

Chosen solution

Hi Rick, do you recall what the error was?

Sometimes program installers and uninstallers mess with certain shared Microsoft files, triggering a message related to a missing VCRUNTIME140_1.DLL file. That can cripple Firefox.

To rule out that issue, you can (re)run Microsoft's installer for the VC Runtime files:

(A) Open https://support.microsoft.com/en-us/topic/the-latest-supported-visual-c-downloads-2647da03-1eea-4433-9aff-95f26a218cc0

(B) In the first section of the article -- "Visual Studio 2015, 2017 and 2019" -- download the 64-bit installer.

(C) Run that installer and restart Windows.

Any improvement?

Read this answer in context 👍 0

All Replies (2)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

Chosen Solution

Hi Rick, do you recall what the error was?

Sometimes program installers and uninstallers mess with certain shared Microsoft files, triggering a message related to a missing VCRUNTIME140_1.DLL file. That can cripple Firefox.

To rule out that issue, you can (re)run Microsoft's installer for the VC Runtime files:

(A) Open https://support.microsoft.com/en-us/topic/the-latest-supported-visual-c-downloads-2647da03-1eea-4433-9aff-95f26a218cc0

(B) In the first section of the article -- "Visual Studio 2015, 2017 and 2019" -- download the 64-bit installer.

(C) Run that installer and restart Windows.

Any improvement?

rickedelson
rickedelson Question owner
more options

Hi,

Yes this fixed it! Amazing! I really appreciate your expertise!

Thank you, Rick Edelson