How to uninstall the program and delete Download Button?

To remove the program from your Mac, you can try following 2 methods.

1. click Apple icon->Force Quit from the top menu. Then open Finder->Application to find the program and drag it to the Trash.
2.You can also download the Appcleaner(http://www.macupdate.com/app/mac/25276/appcleaner) to delete the program.

After removing the program, if Download Button still appear when you watch online videos, you can delete it as below.

For Safari, please click Preference on top menu,select Extensions, then uninstall it.





For Chrome, go to top menu bar, select Preference and Extensions . Then click Trash Can to remove it.



For Firefox, go to menu, select Tools>Add-ons>Extensions to remove it.