Creating Extensions for Safari, Part 2

Take your Safari extension to the next level by learning how to modify the appearance and behavior of any web page. Find out what methods and properties are exposed to JavaScript specifically for extensions, and see how your Safari extension can execute scripts, apply CSS styles, and display context menus. Learn how you can easily adjust an existing extension for use in Safari, and discover how easy it is to publish updated versions of your extension.

WWDC 2010 - macOS