Chrome: Having an internet full of information right at your fingertips is a great way to learn and a poor way to stay focused. Quick Research can help keep you on track by doing brief searches without leaving the tab you're in.
Click on the extension icon and a box will allow you to search Google, Yahoo!, YouTube or do an image search. If you want to follow up, you can open any links in a tab, but for basic inquiries you can get information while staying on the tab you're working on.
Quick Research [Chrome Web Store]