[@types/firefox-webext-browser] proxy.onRequest.addListener listener should return Promise<ProxyInfo>

[donovanglover]

The listener can return any of:

• a proxy.ProxyInfo object.
• an array of proxy.ProxyInfo objects.
• a Promise that resolves to a ProxyInfo object.
• a Promise that resolves to an array of ProxyInfo objects.

Docs: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/proxy/onRequest#addlistener_syntax

[typescript-bot]

Thanks for the discussion about "firefox-webext-browser", some useful links for everyone:

• npm
• DT
• Related discussions

Pinging the DT module owners: @jsmnbom, @codershiba.

[jsmnbom]

Could you post at https://github.com/jsmnbom/definitelytyped-firefox-webext-browser/issues instead pls?