



This style turns the entire location bar yellow in Firefox 3 when visiting a high-security encrypted website just like Firefox 2 used to. This maybe useful for you if, like me, you find the favicon glow not noticeable enough - sorry Larry!
This is an improvement over Gina Trapani's Yellow https location bar, which does not fill the entire location bar and seems to have positioning issues.
For other styles that change the location bar which may suit your needs/tastes better see:
Change URL bar security colors
Urlbar Security background (FF3.0)
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Update (04 July 2008):
◦ Location bar now also turns red for partial/broken encryption sites to warn you. Firefox itself only alerts you by a tiny exclamatory padlock icon in the status bar, which is insufficient warning.