Join the Mozilla’s Test Days event from 9–15 Jan to test the new Firefox address bar on Firefox Beta 135 and get a chance to win Mozilla swag vouchers! 🎁

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

Firefox startup error

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by TyDraniu

more options

Hello, I'm trying to install Firefox (had it installed and running before). The installer works fine, both the downloader and the full installer, but when Firefox starts, all that I get is that empty dialog shown in the image. Tried uninstalling, restarting, deleting AppData folders, registry entries, etc. But no luck. Any suggestions? Thanks!

PS: Running Win 10 64-bit fully updated

Hello, I'm trying to install Firefox (had it installed and running before). The installer works fine, both the downloader and the full installer, but when Firefox starts, all that I get is that empty dialog shown in the image. Tried uninstalling, restarting, deleting AppData folders, registry entries, etc. But no luck. Any suggestions? Thanks! PS: Running Win 10 64-bit fully updated
Attached screenshots

Chosen solution

  1. Enter this link: https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads
  2. From the section Visual Studio 2015, 2017 and 2019 download the following executable file: vc_redist.x64.exe
  3. Install this file
  4. Restart the computer and run Firefox
Read this answer in context 👍 1

All Replies (1)

more options

Chosen Solution

  1. Enter this link: https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads
  2. From the section Visual Studio 2015, 2017 and 2019 download the following executable file: vc_redist.x64.exe
  3. Install this file
  4. Restart the computer and run Firefox