```js // Log the full user-agent data navigator .userAgentData.getHighEntropyValues( ["architecture", "model", "bitness", "platformVersion", "fullVersionList"]) .then(ua => { console.log(ua) });

// output { "architecture":"x86", "bitness":"64", "brands":[ { "brand":" Not A;Brand", "version":"99" }, { "brand":"Chromium", "version":"98" }, { "brand":"Google Chrome", "version":"98" } ], "fullVersionList":[ { "brand":" Not A;Brand", "version":"99.0.0.0" }, { "brand":"Chromium", "version":"98.0.4738.0" }, { "brand":"Google Chrome", "version":"98.0.4738.0" } ], "mobile":false, "model":"", "platformVersion":"12.0.1" } ```

```idl dictionary NavigatorUABrandVersion { DOMString brand; DOMString version; };

dictionary UADataValues { DOMString architecture; DOMString bitness; sequence<NavigatorUABrandVersion> brands; DOMString formFactor; sequence<NavigatorUABrandVersion> fullVersionList; DOMString model; boolean mobile; DOMString platform; DOMString platformVersion; DOMString uaFullVersion; // deprecated in favor of fullVersionList boolean wow64; };

dictionary UALowEntropyJSON { sequence<NavigatorUABrandVersion> brands; boolean mobile; DOMString platform; };

[Exposed=(Window,Worker)] interface NavigatorUAData { readonly attribute FrozenArray<NavigatorUABrandVersion> brands; readonly attribute boolean mobile; readonly attribute DOMString platform; Promise<UADataValues> getHighEntropyValues (sequence<DOMString> hints ); UALowEntropyJSON toJSON (); };

interface mixin NavigatorUA { [SecureContext] readonly attribute NavigatorUAData userAgentData ; };

Navigator includes NavigatorUA; WorkerNavigator includes NavigatorUA; ```

I've spent a lot of time in frustrated conversations arguing the case for browser extensions being treated as a first class concern by browser makers (well, one browser maker). But more and more, I've come to settle on the conclusion that any browser extension of the sort that Wildcard is should also come with the option of using it (or possibly a stripped down version) as a bookmarklet, or a separate tool that can process offline data—no special permissions needed.

(This isn't because I was wrong about browser extensions; it's precisely because extension APIs were drastically limited that this becomes a rational approach.)

This is a useful little tip.