Web page annoyances that I don't inflict on you

> I don't do some half-assed horizontal "progress bar" as you scroll down the page. Your browser probably /already/ has one of those if it's graphical. It's called the scroll bar. (See also: no animations.)

Sadly, I would argue that this is inaccurate. Especially on mobile browsers, the prevalence of visible scroll bars seems to have dropped off a cliff. I'll happily excuse the progress bar, especially because this one can be done without JavaScript.