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by natorion 2795 days ago
You can enable it on Firefox nightly. I think the config name is something with shared_mem.
1 comments

It's javascript.options.shared_memory. It's currently set to false in Firefox 63.

As other people already wrote, it was disabled at the beginning of the year because of timing attacks related to Spectre and Meltdown. Details at https://blog.mozilla.org/security/2018/01/03/mitigations-lan...

We had this thread on HN about multithreading Rust with WASM https://news.ycombinator.com/item?id=18283110