Add "Sign-in to YouTube to fix links opening in mini player" to FAQ

[gnarliest-gnome]

I just updated revanced with a new patch and links were opening in the mini player. I knew this happened last time I updated/installed revanced but couldn't remember the fix. I searched all the documentation and couldn't find it. Eventually I found a reddit comment saying to fix it you have to sign in to youtube.

It's a super simple thing to add to the FAQ.

Thanks.