Javascript isn&#x27;t strictly critical for IoT, but it does benefit for being the language of the web. FFOS is in a great position to take advantage of this, because FFOS&#x27;s &quot;apps&quot; are what we generally call web apps.<p>Mozila doesn&#x27;t have to reinvent wheels (though they will of course have to extend what we think of as the web) to handle mechanisms that have already been discussed&#x2F;implemented&#x2F;proven on the web.<p>I think if you wanted to do stuff with those other languages, you&#x27;d have to build up a little bit of tooling, libraries, and other odds and ends, and you can skip at least a little of that by using JS+HTML+CSS