Firefox has ended support for 32-bit Linux

If you are running a 32-bit (x86) Linux operating system, Firefox is no longer supported as of Firefox version 145.

If Firefox is already installed on your computer, you can continue using it but you will not receive updates beyond version 144. If you are running a 32-bit version of Firefox on a 64-bit Linux system, you can install the 64-bit version of Firefox instead from the Firefox for Linux download page.

Firefox Extended Support Release (ESR) will continue to receive updates for 32-bit Linux but will not receive updates beyond ESR version 140.

System requirements for Firefox may vary depending on whether it is provided by your Linux distribution or by Mozilla, which means you may still be able to get a recent version of Firefox for 32-bit x86 systems from your Linux distribution.