The control software for some older printers, scanners, or 3D printers requires a very specific browser version to launch its configuration pages or management console. Developers who still test their extensions on old Firefox versions may also need these builds to identify compatibility issues.
Before version 5.0, Firefox releases were less frequent, but starting with version 5.0, Mozilla adopted a rapid release cycle, delivering major updates every six weeks. Download Firefox 12-51 52 Esr
For standard legacy versions, click on the folder matching your version number (e.g., 12.0 , 45.0 , or 51.0.1 ). The control software for some older printers, scanners,