allows you to enable many hidden features in Safari by activating the debug menu. Using this menu, you can enable tabbed browsing in v62 and higher, fix problems with banking sites, and troubleshoot your own webpages. This minor update adds enhanced support for newer versions of the Safari web browser and also features a slightly refined user interface.
http://www.scifience.net/debugger.html
http://www.scifience.net/debugger.html