Do not try to update to Firefox 116 or higher, as these versions will not run on Windows 7. Why Firefox 115 ESR is Your Only Option
To ensure you are using the correct, supported version for your old machine, follow these steps. 1. Download the Correct Version (Firefox ESR 115) download firefox windows 7 32 bit
Look for "Firefox Extended Support Release (ESR)". Platform: Choose Windows 32-bit . Do not try to update to Firefox 116
How to Download & Install Firefox on Windows 7 (32-bit) in 2026 supported version for your old machine
Mozilla is providing crucial security updates for this branch until the end of August 2026.