Update Firefox support for WebAssembly JS-PI

[KirtiRamchandani]

Problem

mdn/content#44167 tracks Firefox 152 Nightly support for WebAssembly JavaScript Promise Integration (JS-PI), but BCD still marked Firefox as unsupported.

Root cause

webassembly/jspi.json had no Firefox support entry for the new Nightly implementation.

Solution

Mark Firefox 152 support behind the javascript.options.wasm_js_promise_integration preference. Firefox for Android continues to mirror desktop Firefox for this feature.

Tests run

• node lint/lint.js webassembly/jspi.json
• node_modules/.bin/prettier.cmd --check webassembly/jspi.json
• node -e "JSON.parse(require('fs').readFileSync('webassembly/jspi.json','utf8')); console.log('ok')"
• git diff --check

[github-actions]

Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

[KirtiRamchandani]

Thanks — preview URLs look good; no rendering issues spotted on my side.

[Elchi3]

Thanks for your PR! This appears to be shipping in Firefox 153, according to https://bugzilla.mozilla.org/show_bug.cgi?id=2044809

[chrisdavidmills]

@KirtiRamchandani thanks for attempting this.

To be honest, I'd prefer you to add data for the two JSAPI features that comprise this feature, rather than a single feature data point.

The two features are:

• WebAssembly.promising() — this is a static function available on the WebAssembly object; you'd add that here: https://github.com/mdn/browser-compat-data/blob/main/webassembly/api.json
• WebAssembly.Suspending — this is an interface available on the main WebAssembly object. It only has a single sub-feature — its constructor. You'd add that as a new file, similar to https://github.com/mdn/browser-compat-data/blob/main/webassembly/api/Global.json.

They'll have the same support versions as the file you just updated, but I'd like you to delete that file and make the two updates described above instead.

See also @Elchi3's comment about the Fx support version.

See also here for the spec: https://webassembly.github.io/js-promise-integration/js-api/#jspi

[KirtiRamchandani]

Thanks @chrisdavidmills working on this now

[chrisdavidmills]

@KirtiRamchandani, this is what I was hoping for, thanks!

Although, afaics, JS-PI is set to be enabled by default in Fx 153, not behind a flag. Did you have evidence to the contrary?

[KirtiRamchandani]

Sorry I just missed the https://hg-edge.mozilla.org/mozilla-central/rev/da1c4762d8af
Updating it now. Thanks for rteview.

[github-actions]

The lint check found auto-fixable issues. Apply suggested changes (attributed to bcd-linter), or to fix all at once, run npm run lint:fix locally.

See also: Automated lint suggestions on pull requests

[Elchi3]

Thanks for your PR!

https://github.com/mdn/browser-compat-data/blob/main/webassembly/jspi.json also needs to be updated to say it is supported in Firefox 153

[Elchi3]

Actually, I got that webassembly.jspi key covered in #29883.

The additional keys that Chris rightly pointed out aren't in webref (and therefore not in the collector) as they are only specified in a forked version of the Wasm spec, so yes let's get them in manually here. Thank you!

Issues addressed