How would I make a custom settings tab like the Roblox+ one?

Hello there. I will try to make this as short as possible. I am making a Roblox plugin and I wanted to have an integrated settings tab so users can customize their experience. My issue? I have no idea how to do this. I have seen other plugins like Roblox+ integrate their own settings tab into the default settings tab, which looks something like this:

The URL that corresponds to this settings tab is!/info, which would seem like an extension to the current settings tab. Now, if you were to type that URL into your browser without having the Roblox+ plugin, then it would simply take you to the default settings. That being said, how would I make my own custom tab that is integrated into the already-existing settings? I would want a button to be added (which I know how to do that) that would look like the image below, and when that button is clicked, it would simply go to a tab that looks like the Roblox one, inherits the Roblox CSS code (so it looks and feels like the Roblox one), but has custom settings which I can individually script.

Although I could easily do this if a custom URL loaded me into a blank page, I have no idea how to “overwrite” the current settings tab so that a URL such as!/my_custom_plugin would bring you to the modified settings. If anyone has any idea how to do this or could guide me to appropriate resources, that would be amazing. Thank you for your time and help.

I believe this is a chrome extension only type thing.

Yeah. I went to Stack Overflow to solve the problem. Unfortunately, there is Roblox code that prevents you from holding the hash, so the only way to do it is to “modify” the link. Thank you for replying though.