For those who are using Opera Web browser (Secure Fast Browser). And if you are not tried opera yet give it a try you will love it.
Less memory consumption than Firefox
Secure than Firefox
Faster than Firefox
More features inbuilt than Firefox
So Opera is the Best browser according to me.
See some test results from other sites
1. Life hacker (Read the comments also)
also in the memory test, load pages and just minimize and maximize opera and Firefox and change the memory usage.
2. How to Create
So for the opera users
1. Shortcut keys and Change in shortcut keys
2. Opera 9 FAQ
3. Tamil’s Blog about Opera (Anything and everything on Opera ;) )