firefox tools

Once again I find myself discovering new Firefox extensions to aid my web site development, many based upon Firebug, a MUST HAVE extension. "Drupal For Firebug" is what I will be trying next. Any hints for what to do with it first? Any tips?

Please share what other FireFox Extensions you use, and in a month, I will publish a summary in our Wiki.

To add value to my post, below are some of the extensions I use, or new ones I just found and will be trying out.

Hey gang...
You all probably already know about this...
but for those of you who don't, check out and install the Firefox Web Developer's toolbar.
https://addons.mozilla.org/firefox/60/

It's a great way to take a peek at the behind the scenes source code on drupal sites... especially the ones that look good... and not so much like a blog. :)

I use the "Outline Block Level Elements" all the time.
Also, the "Display ID & Class Details"

I just heard about another Firefox extension that I'm going to check out too... haven't installed it yet though.