Will Firefox version 100 work on Windows 7?

Revision Information
  • Revision id: 243090
  • Created:
  • Creator: Marcelo Ghelman
  • Comment: some more details
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: AliceWyman
Revision Source
Revision Content

Beginning with Firefox version 100, Microsoft security update KB4474419 is required for successful installation of Firefox on a computer running the Windows 7 operating system. For details about this Windows update, visit the Microsoft Technical Support website.

Most Windows 7 users will have Microsoft update KB4474419 already installed, since it was an automatic Windows update. To make sure this update is installed on your computer:

  1. Click the Windows Start button or press the Windows key Windows Key.
  2. In the Start Menu, click Control Panel.
  3. In the Control Panel window, click the Programs link, then click Programs and Features.
  4. Click on View installed updates and wait for the list to be filled in.
  5. Search for KB4474419 using the search field in the upper right corner.
    Win7InstalledUpdatesKB4474419

If Security Update for Microsoft Windows (KB4474419) is listed, you can successfully install Firefox version 100.