The true power of firefox is in the add-ons available. For the web-developer there are a number of add-ons which are not only essential but also means that most of the time you only need firefox to carry out your work.
The list of these include:
firequery – An addon for firebug which shows the detail of what’s going on with jquery on a page.
page-speed from google – Another addon to further expand firebug. This time it’s from google and it shows how long each part of a page is taking to load and has helpful hints on how to speed the page load process up.
measureit – A neat little addon which lets you drag the mouse over the page to get element sizes. This is useful when designing pages.
colorzilla – Another essential design tool. Just click on the eye-dropper and anywhere on the page it will tell you the colour.
seo for firefox – These two are from Aaron Wall of seobook.com fame. It displays seo information for the page that is being displayed. There’s also tools to delve deeper into the seo performance of the page.; rankchecker
– Thisaddonn allowssearchtermss / websites to be entered then theaddonn goes away and find where the site is ranking for that search-term.
google toolbar – Helpful toolbar if you use a lot of Google’s services. Obviously it was mainly used for displaying the all important page-rank but as page-rank isn’t all of how Google ranks a site it isn’t as important as it used to be.
This is my current favourite addons for firefox. I’m going to be on the lookout for more soon mainly to help with general blogging like image finding, screenshot etc. There are plenty being developed all the time so let me know which addons you recommend.