PSA there's an add-on for Firefox called Control Panel for Twitter.

and it does all kinds of cool stuff, lots of settings in the options tab in your add-ons after it's installed. It removes the X branding and replaces with bluebirds. and it can get rid of the For You tab by hiding it and defaulting to Following.  All kinds of useful and nice to look at things.

Probably just me that uses Twitter in browser, but I tripped over it and it's nice.