The page constantly re-renders on mobile - worst "responsive design" coded in JS ever seen.<p>Firefox market share is in free fall for months. Sad, but no wonder. They don't care about users. Support the old API as long you call your browser "Firefox". Fire all your "designer" that mess around with the UI - they habe too many off them, they are bored and change the look way too often. I removed the update service, and use Firefox only for local development and reverted back to the old Firebug. I would be interested in Servo plus an HTML based UI from them - but I don't wait for them, it see,s it will take 2+ more years for a useable version. I would have assumed the support the current Firefox with XUL until then, but without old API support and without XUL support, there is no reason for Firefox anymore. Chrome and Safari are far ahead.