Apple released Safari 5.0.1 with the support of Safari Extensions. Extensions is available in Safari 5.0 but [you have to set it up in order to use it](http://sanziro.com/2010/06/how-to-install-safari-5-extensions.html). Safari 5.0.1 also has direct access to the newly launched [Safari Extensions Gallery](http://extensions.apple.com/) website. Safari Extensions Gallery serves as the central hosting site for third party Safari extensions. With this new release of Safari, installing extensions from the site is just a simple click on the “Install” icon.
Beside the support of extensions, Safari 5.0.1 also plug the [Autofill vulnerability](http://sanziro.com/2010/07/safari-autofill-exploits.html) which exposes your address book data.