The site will detect that you are using Windows 8 and automatically prompt you to download the Firefox 115 ESR installer .
Mozilla will provide critical security updates for this version until August 2026 . This ensures your browser remains safe from newer web threats even though the underlying operating system is no longer updated by Microsoft. How to Download and Install mozilla firefox download windows 8
Includes standard features like Enhanced Tracking Protection and private browsing. The site will detect that you are using
Follow the on-screen instructions. The installer will automatically choose the 32-bit or 64-bit version based on your system hardware. System Requirements for Windows 8 How to Download and Install Includes standard features
While you won't receive the latest "feature" updates (like the newest AI tools or UI overhauls found in version 135+), Firefox ESR offers:
Critical patches for known vulnerabilities are delivered through 2026.
When you download Firefox on an older system, you are automatically moved to the Firefox ESR channel .