A light weight browser can greatly enhance the productivity and comfort of tech savvy internet users. The known browsers like IE, Chrome, Firefox etc, all are resource hungry. IE is not available on Linux and hence users are mostly forced to use Chrome or Firefox.
Chrome is resource hungry and tends to perform poor as the number of opened tabs increases.
Firefox has improved a lot in recent times and has really become performant now a days. Quantum Firefox is a very good browser for use by developers.
Opera is also another good browser which is sleek, light weight and performant. I have been using opera in the recent times and am impressed with the UI and the performance of opera. It is going to be by default browser for grokking internet.