The Firefox Browser is now the flagship product of the Mozilla open source project, and is the darling of web developers. If it is not yours, you should consider trying it out.

I'm going to show you all of my favorite Firefox add-ons. I can't show you all of the add-ons out there because there are thousands, but these ones make my life a lot easier:

1. Web Developer by Chris Pederick
   This thing rocks! It adds a toolbar to the browser that is loaded with features to help you develop for the web! Things like outlining various html elements on the fly, enabling and disabling styles, resizing the browser window to various standards, validating your pages, it has a built in ruler tool, options for images, forms, cookies - you name it!
   
2. ColorZilla by Alex Sirota
   Super little tool that sits tucked in a little corner and when you click on it you can sample any color on the web page and copy it to your clipboard. Did I use the right blue on those links?
   
3. MeasureIt by Kevin Freitas
   Love it! This thing makes my life so much easier. It allows you to draw a box on the page and measure it's dimensions. I also find this tool invaluable for making sure things are aligned properly.
   
4. Firebug by Joe Hewitt
   This one? Sooo good. You can edit, debug, and monitor CSS, HTML and Javascript live on any webpage!
   
5. IE View by Paul Roub
   This inconspicuous little add-on lets you load pages in IE! Perfect for cross browser testing!
   
6. HTML Validator by Marc Gueury
   This little guy puts a green checkmark at the bottom of your browser if the document validates. If it doesn't, it shows warnings and errors with a click so that you can hurry off and fix them.
   
7. SeoQuake by The SeoQuake Team
   This extension gives you a ton of information on your page including Google page ranking, Alexa ranking, showing keyword density and META tags, it allows you to see backlinks and so much more! Quite a handy little thing.

Now here's the skinny folks. I have ALL of these installed on my browser. They are so well done and inconspicuous that you probably wouldn't even notice I had them there! They don't slow anything down... they speed it up!