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> or click the following link if you have the FireFox browser (Chrome’s implementation of WebAssembly has much worse performance).

Now that is interesting. I've been on the FireFox train for 20 years but I haven't seen a "best viewed in FireFox" tag in a long time. It's a pleasant surprise, but I'm also curious how Chrome has managed to be bad at this.

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FWIW, I'm seeing the opposite in my home computer emulators (https://floooh.github.io/tiny8bit/), which are compiled from C with heavy bit-twiddling on 64-bit integers. Firefox is slightly slower than Chrome (on an M1 Mac) - but not enough to matter much (around 5..10% or so).

It might be heavily depending on the actual 'instruction mix' and host CPU instruction set (e.g. maybe Firefox has better support for x86 than ARM).

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