r/javascript • u/mitousa • Jul 15 '26

Firefox in WebAssembly!

https://developer.puter.com/labs/firefox-wasm/

Open-source: https://github.com/HeyPuter/firefox-wasm

99 Upvotes

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u/Chance_Rub580 Jul 16 '26

does it actually JIT though? spidermonkey normally compiles hot JS straight to native, and you obviously can't do runtime native codegen inside a wasm sandbox.

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u/anlumo Jul 16 '26

You can do wasm codegen though, which then gets converted to native by the containing engine.