I recently put together a collection of my favourite and most used SEO add-ons for Firefox. So check out my SEO Tools Advanced collection. Feel free to subscribe to the collection which I will be adding to and updating as more great SEO add-ons come along.
These tools are not only easy to install and use, but extremely useful on a day to day basis. TBH, I don’t know where we would be without them 
- so a big thanks to all the creators for putting such great and useful tools out there!
There are a few additional Firefox add-ons I use, which are not listed on the add-ons website so are not part of the collection. See them here:
Link Diagnosis: You need the firefox add-on installed to properly use the link diagnosis tools. Pulls some great data on site back-links.
Mozbar: The SEOmoz Toolbar - Get access to all the SEOmoz tools and ranks via the toolbar. (Only available to PRO Members)
RankChecker: The RankChecker from seobook is a great tool for seeing where your site ranks for chosen keywords quickly and easily.
Do you have other SEO Firefox add-ons you recommend? Let me know!
Omar said on June 22nd, 2009 at 11:25 pm
Hi, I like the ‘Firefox Accessibility Extension’ and use it quite often. Although its name is not very descriptive, it’s a great SEO tool.
It lets me see titles, alt text, headers, meta descriptions, titles, images, links, etc… (all the most important SEO info) all from one toolbar, and has links to things like W3C Validation.
If you haven’t used it I highly recommend it, it’s one of the three main SEO related plugins I use on Firefox.
Regards,
OZ
Massage Newcastle upon Tyne said on October 15th, 2009 at 3:44 pm
My favourite add-on is Link Diagnosis too, incredibly helpful and must have saved me literally DAYS of time by now. On a personal level, the Speed Dial add-on is my favourite as it displays your favourite websites on one page, and lets you create groups of favourites as well.
Criação de sites em Belo Horizonte said on December 16th, 2009 at 4:44 am
Tanks for post!!!