Every technical blog out there has "top 50 tools for developers" or "Essiental 25 tools for developrs" and must have's. And those are nice
to look through and see what other people have created, but a lot of it is just a bunch of junk. So instead of telling you what you should
be using, I'll give you the list of tools I use everyday while managing sites.
Firebug is the single most useful plugin that Firefox
It's probably the most useful plugin that any browser could have, and is the
reason I do all my initial debugging work in firefox.
2. Web Developer
This is a really nifty plugin for firefox that allows you to manipulate everything from cookies to forms and DOM objects.
You can disable certain portions of your site to see how the rest of would flow, and it comes with a css/js validator.
this rater, you can see which compression algorithm works best with your js file.
4. CSS Compressor
way with your users as they try and download your 5+ CSS templates.
5. Browser Shots
This one is at the bottom of the check-off list just to double check that everything is cross-browser compatible. Yes your site needs
to be on the open web before you can use this, but that's why you check it across all the browsers at your disposal before release,
and then run through this site for final safety checks.