Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Crashed Firefox, not loading Mozilla website

  • 1 reply
  • 1 has this problem
  • 2 views
  • Last reply by cor-el

more options

Uninstalled and reinstalled once, restarted Firefox. Cleared cache, cookies, and history. Troubleshot it in both computer settings and Firefox settings. Made sure that it was appropriate version for Win 10. Restarted computer. No workee.

Uninstalled and reinstalled once, restarted Firefox. Cleared cache, cookies, and history. Troubleshot it in both computer settings and Firefox settings. Made sure that it was appropriate version for Win 10. Restarted computer. No workee.

All Replies (1)

more options

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

See "Visual Studio 2015, 2017 and 2019":

You may not need the latter (32-bit version) if you use 64-bit Firefox. You may have to reboot the computer.