Chrome extension help

Question

I want to notify an user using Chrome browser. I need something powerful like changing the Chrome skin colour, highlighting things or at the least like this extension putting an icon on the address bar https://chrome.google.com/extensions/detail/jhejngphiacapbgllhagbpdkkdieeaej

Can someone please help?

Edit:

Q1, can I change the theme when a new tab or new chrome window is open? Like the change in incognito mode?

Q2, How do I put an image on the address bar like flag fox?

Answer 1

A1: No you cannot. The user must agree to changing their theme. Imagine if an extension switched your theme to show "inappropriate" content.

A2: Use page actions. http://code.google.com/chrome/extensions/pageAction.html