all you need is fireox some people say its bulky but it indeed is a great way from keeping adware/malware of your computer
most malware and adware are installed by clicking links on web pages. or web pages starting scripts just by being on it
mywot is web of trust millios of people add bad sites to the list, and
for the rest there is noscript.
these 2 tools will keep you safe from the shady websites and all the shady people who run them or send users there from there "legitimate" website.