Firefox 'Preferences' tab questions

[DougieFresh4U]

While setting up Preferences in the Edit tab I came to the last one which is 'Advanced' . Then under the 'Encryption' tab it has where all the security certificates are. I am curious as to what the screen shot I posted is all about. Are those things that I should remove, as I noticed one was listed 'Equifax' which I thought is the 'Credit debt Collection Agency' I'm not being paranoid, but wondering what all those certificates are listed for.
I would appreciate if some one could break it down to me.
Thanks

[handy]

Certificates are an effort to protect the user from malicious web sites.

You don't have to pay any attention to them. They are for all intents & purposes safe.

Here is plenty to go on with:

http://www.google.com.au/search?q=web+certificates&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a