The Extensions Gallery itself is accessible from their browser menus.
or directly to the address extensions.apple.com . Downloading and installing an extension from the gallery takes only one click, and there is no need to restart the browser. At the same time, the extensions themselves can be automatically updated, and they are easy to manage in Safari. Each user extension can be enabled or disabled separately from other extensions.
"Safari 5 was a great success, and user feedback on new features, such as Safari Reader, was fantastic," said Brian Kroll, Apple's vice president of product marketing for OS X. "We are very pleased that so many leading developers have started creating so many extensions and I think that our users will like the opportunity to customize Safari for themselves."