The Unofficial Homestuck Collection is a heavily customised browser, built from the ground up to support Homestuck and its related works. Flashes? We got 'em. The collection runs Flash content natively, providing the most authentic Homestuck experience possible.
Don't get it twisted though, because "browser" in this context doesn't mean "online". The Unofficial Homestuck Collection is completely self contained, and never has to connect to the internet once you have it downloaded.
From the very beginning, The Unofficial Homestuck Collection has been designed to work as a safe way for new readers to get their teeth into the Homestuck universe. If you so choose, all future content will be carefully gated off until your progress in Homestuck makes it safe to view.
We've got complete control over the browser, so you'd better believe we're taking advantage of it. Mid 2000's quality bitcrushed Flash audio? Nah, man. Almost every single flash in Homestuck has been painstakingly reworked with the highest quality music available. You have to hear it to believe it. Want to use themes on every page? Go nuts, I'm not the boss of you. Arrow key navigation? Automatically opening pesterlogs? You got it. Want absolutely none of the above? That's also an option! It's Homestuck, the way you want it.
There are even third-party mods.
Download the application, download the assets. Done.