It all depends on many factors to which browser is the fastest.
1. Some Add-ons or extensions will make browsers run slower, also too many will cause more resource usage.
2. Version of Windows. Some browsers will run faster on (Vista, 7, 8) while others will run slower.
3. System Hardware- CPU, motherboard, RAM, Display Adapter, etc. all play apart of how fast the browser will be, some hardware components will handle browsers differently.
You just can not say this browser is the fastest because it is the fastest on your system, on other systems it maybe the slowest.
On my desktop (Win7)- Maxthon Cloud Browser is the fastest but on my laptop (Win8), IE is the fastest. On my friends desktop (Win7 gaming system), Google Chrome is the fastest.
The safest browser is Google Chrome because of its large development team and all of the money put into keeping it patched.
Enjoy!!