Introducing Firefox Quantum
It’s pretty fast.. Check the second link to see a video comparison or try for yourself.
They have a couple different versions and one being Firefox for Developers… which allows you to run side-by-side with your normal Firefox browser (There are very little differences). So one you can set to forget EVERYTHING about all websites and the normal one you can set with whatever cache you are comfortable with. Granted, you could also run Chrome or Firefox in Incognito/Private modes to immediately get the benefits of a “clean” browser (no extensions, no cache, just a fresh browser) typically used when we are designing sites and checking functionality.
You can get the Beta versions below, Quantum launches on November 14th.