Is there an anti phishing software in ubuntu which may even rate websites while searching and surfing ,something like avg secure search in windows or the software u get with bitdefender which puts a ticks or crosses on links while searching.Though most modern browsers come with minimal anti phishing settings(or tools) but a good independent software working on all browsers(I am talking about even the not so famous ones) and rating websites wood be good.
You can route your DNS through something like OpenDNS or Google Public DNS:
This is free and can easily be installed at router level to give network-wide protection.
You can install bitdefender or Avast.
Steps to install bitdefender:
Once you install and run bitdefender program. It will monitor the sites for any security threat that you visit.