Old computers have already been left behind by the raw CPU power required by modern websites regardless of the browser, and the hunger for memory of multi-process Chrome. A Conroe CPU is about the oldest that can be comfortably used, and it implements SSE3.

it's not just Google Chrome alone that will require CPUs with at least SSE3

Microsoft Edge is also following suit with the SSE3 requirement starting with Edge version 126

https://www.neowin.net/news/microsoft-is-ending-edge-support-on-computers-without-sse3/

https://learn.microsoft.com/en-us/deployedge/microsoft-edge-supported-operating-systems

Quote

After version 126, Microsoft Edge will stop supporting CPUs that lack SSE3. Devices with these CPUs will not receive any more updates.

 

Edge is based on Chromium and closely follows the upstream changes, so no wonder.

On 5/15/2024 at 3:31 PM, erpdude8 said:

Google Chrome alone that will require CPUs with at least SSE3

 

Processor instructions emulator

https://www.intel.com/content/www/us/en/developer/articles/tool/software-development-emulator.html

It's safe to emulate a processor instruction set, it's just a programme, but emulation is much slower than native execution so you probably won't like the performance.