[sertorius]

> this browser does not have SharedArrayBuffer support enabled

It was disabled for Spectre safety reasons, but it can be re-enabled by navigating to "about:config", searching for "javascript.options.shared_memory" and toggling it to enabled. (But it was obviously disabled for good reason, so might want to enable it temporarily)

[davidhyde]

Thanks! That fixed that problem. Except now I get "this browser does not support passive wasm memory". There aren't any obvious javascript.options.* options for that.

[alexcrichton]

Oh dear sorry about this, it's a little too non-obvious how to see the demo! I've [pushed a small commit](https://github.com/rustwasm/wasm-bindgen/commit/f016ae5846bf...) to update the demo to include information about browser requirements. Today this demo requires Firefox Nightly (64) and requires the `javascript.options.shared_memory` feature to be enabled. Other browsers will likely soon be able to run the demo as well!

[davidhyde]

Thanks, I'll give that a go!