Mozilla is FINALLY pulling the plug on 32-bit Firefox builds for Linux, a decade after Google Chrome did the same. Why now? It says they're getting hard to build.
The i386 architecture is now only intended to be used on a 64-bit (amd64) CPU. Its instruction set requirements include SSE2 support, so it will not run successfully on most of the 32-bit CPU types that were supported by Debian 12.
That depends on the specific CPU model used: