Google released a cool new extension for Mozilla Firefox on Wednesday called “Google Safe Browsing.” It alerts you when you visit a known phishing site. A phishing site is a website designed to trick you into divulging financial or other personal information, usually for the purpose of identity theft or fraud.

Of course, if you follow basic anti-phishing rules (mainly, don’t click links in any email asking for information; type the links in manually), you should be safe from phishing threats, but this adds a nice extra level of protection.

Here’s a screenshot of what the alerts look like:

Google Safe Browsing Alert