What is a good website/blog I could refer to for learning how to manipulate the Firefox configuration (about:config)?

The Mozilla fora have a lot of discussions on this issue.

or you could ask our resident computer genius @johnryanpowell.

Also, a lot of the options speak for themselves. And if you’re unsure, a quick Google will bring up help (which is often MozillaZine I believe).

Here’s the article I use The Ultimate Guide to Speeding Up Firefox. It has normal settings and about:config settings.

http://mozillazine.org

You can look through the security add-ons at mozilla.com. Although, I’ve switched to chrome and can’t go back :)