safari plugins

[vintageapple]

What are the plugins you use most/need?

Im finding adBlock and click2flash as necessary.
Does anyone know a plugin to limit website viewing time for safari?

 

[Kyffin]

I find "Duplicate Tab Button" so essential that I forget its an extension and not something built into Safari while "Search Preview" and "TinEye" have come in handy. Definitely recommend "A Cleaner YouTube" too, it isn't useful as such, but I appreciate the more grown-up look and not seeing those puerile comments

Don't know about limiting time on Safari though...