While Mozilla typically encourages the latest version, there are several reasons why you might need 91 ESR specifically:
Some users prefer the specific layout and tab behavior of the version 91 build before later iterations changed the UI further. download firefox 91 esr
The to the Mozilla archive for your specific OS. While Mozilla typically encourages the latest version, there
The Extended Support Release (ESR) is a version of Firefox designed for schools, businesses, and organizations. Unlike the standard "Rapid Release" version which updates every four weeks, the ESR version receives security updates for about a year while keeping its core features and interface consistent. Unlike the standard "Rapid Release" version which updates
Mozilla maintains a comprehensive FTP archive of every version ever released. This is the most reliable way to find 91.0. Navigate to the . Look for the /pub/firefox/releases/91.0esr/ folder. Select your operating system (Win32, Win64, Mac, or Linux). Choose your preferred language (e.g., en-US ). 2. Enterprise Deployment Tools