Chrome DevTools. Google Chrome Developer Tools: 12 Tricks to Develop Quicker. 7 Chrome Tips Developers & Designers May Not Know. I'm not sure about you, but Google Chrome has been my primary browser for quite some time.
At first the simplicity and speed of Chrome initially drew me in. I do admit I went back to Firefox every so often for Firebug's rich set of debugging tools. Tooling & The Webapp Development Stack. More productivity and less stress with a robust front-end toolchain Paul Irish. 2012.
You can navigate with → and ↓. Also space gives an exposé mode (that might be quite slow).