✅ Step-by-step instructions

  1. Check your system compatibility
    Make sure your Windows version is supported. Firefox no longer supports Windows 8.1 and below for the standard release. Mozilla+2Mozilla Support+2
  2. Download Firefox
    • Open your current browser (for example, Edge or Chrome) on your Windows PC.
    • Go to the official Firefox download page: mozilla.org/firefox/windows Mozilla+1
    • Click the “Download Now” button to get the installer. Mozilla Support+1
    • (Optional) If you prefer an offline/full installer or a custom install, you can choose that from the “Custom installation” link in the support article. Mozilla Support+1
  3. Run the installer
    • Once the file is downloaded, open it.
    • Windows may show a “User Account Control” (UAC) prompt asking if you’ll allow the installer to make changes—click Yes. Mozilla Support+1
    • The installer will automatically install Firefox into the correct folder (e.g., C:\Program Files\Mozilla Firefox\) by default. If you run without admin rights, it may install to your user directory. Mozilla Support
    • Wait for the installation to complete.
  4. Start Firefox and set it up
    • After installation, Firefox will launch and show a “Welcome” or setup page.
    • You may set Firefox as your default browser, import bookmarks from another browser, etc.
    • You’re all set — Firefox is installed!
  5. (Optional) Install via Microsoft Store
    If you’re using Windows 10 or Windows 11, you can install Firefox from the Microsoft Store:
    • Open Microsoft Store → Search for “Mozilla Firefox” → Click Get or Install. Mozilla Support+1
    • Note: The store version and the direct download version may maintain separate browser profiles. Mozilla Support

🛡️ Tips & things to keep in mind

  • Always download from the official Mozilla website to avoid fake installers.
  • If your Windows version is very old (e.g., Windows 7 or 8.1), Firefox may still work but with limited or ending support. Wikipedia+1
  • After installation, Firefox typically updates itself automatically in the background to keep you secure. Mozilla Support+1
  • If you see a warning like “This installer may harm your device”, don’t worry if you’re on the official site—it’s a generic Windows SmartScreen alert. Mozilla Supp