> A big issue with Haiku is that there really isn’t a modern web browser available right now.

The web browsers available to Haiku are all based on a recent version of WebKit (As of now we have merged commits from upstream dating from 2018), the same engine in Safari and it also allowed QtWebKit-based apps to run, previously Otto browser and Qupzilla until they migrated to QtWebEngine (based on the Blink engine which we don't have yet). So to me, that seems to be modern for a web browser that has HTML5 and can also play YouTube videos.

Also, I have just replied to your comment on a recent 64 bit Haiku nightly in WebPositive.