Camino started out with a limited feature set compared to Firefox and Safari, but has quickly caught up. Most standard features of today's browsers come standard on Camino. Though it cannot be compared to the extensions available for Firefox, Camino does provide most of Safari's features a general user would require. The complete feature set of Camino is pretty long but, I will however point out a some of the prominent features in the app.
Search engines can be added and removed from the built-in search feature of the Browser. So if your preference is Google, Yahoo or even Bing, you can put it right up there on the right hand side top corner.
Tabbed browsing is almost the defacto norm today, so it's right in there. Also handy is the built in update finder that will let you perform browser updates when they are available.
Being a browser specially developed for the Mac platform the browser offers complete support for Applescript. If you are power user who makes use of Applescript, then this opens up a lot of opportunities for you. Apart from these the browser comes loaded with the regular features set, like feed detection, annoyance blocking, session saving, spellchecking etc.