DontPhishMe is an Anti-Phishing add-on for Mozilla Firefox which utilizes the pattern matching techniques to provide anyone with information and notification to protect them against online banking phishing website.
Here is a little more information about the add-on from the developers:
DontPhishMe is an add-on to Firefox that alerts you if an online banking web page that you visit appears to be asking for your personal or financial information under false pretenses. This type of attack, known as phishing or spoofing, is becoming more sophisticated, widespread and dangerous. That’s why it’s important to browse safely with DontPhishMe. DontPhishMe will automatically warn you when you encounter a page that’s trying to trick you into disclosing personal information.
You can learn more about the DontPhishMe add-on for Firefox at the Firefox Add-ons website.