Apple released Safari 5.0.1 on Wednesday, officially enabling third-party extension support in the Web browser application. The update also enables support for Safari Extensions Gallery, available via the Safari menu and at the Apple Web site.
Safari 5.0.1 also includes security patches that fix a flaw where AutoFill could be called without user interaction giving an attacker your personal information, and also address an issue where a maliciously-crafted RSS feed could let an attacker copy files from your computer, and fix several flaws that could lead to application crashes and arbitrary code execution.
The Safari 5.0.1 update is free and available via Apple’s Software Update application.
[Updated with additional information about security patches]