> Note to web developers who are unfamiliar with keyboards: Make sure your fixed/sticky header/footer banners don't hide content when using "Page Up" and "Page

> Note to web developers who are unfamiliar with keyboards: Make sure your fixed/sticky header/footer banners don't hide content when using "Page Up" and "Page Down". Firefox has specific code to detect banners and reduce the Page Down distance. This code fails on new Twitter.