Remove suggestion of Smooth Gestures (spyware)
remove 'google ad' label and yahoo ad
Set document title to the message title
fix the bug that cannot show timestamp of new msg

problem in parse_thread_list’s cloneNode logic
Further cleanup unnecessary ads

remove all setTimeout, setInterval initially, and script tag in
view_check_more_check_content
Won't HoverIntend if window is not in focus

to prevent unwanted page change