The BTRoblox extension is an add-on for the Roblox website that makes it look different and improves its core website functionality by adding many new functionalities.
BTRoblox can change many aspects of the way you use the Roblox website. For example, it can change how your Profile page looks. (this to this). It also does things like changing the styling of the menu on the left or resizing how much is shown per post (truncating them). BTRoblox offers a variety of different color themes, including Black, Red, Dark As Night, and Default. It also resolves the issue of audio suddenly stopping when you hit play. It hides the advertisements and makes it possible to download soundtracks from the Roblox audio library.