SEO toolbars are highly useful utilities providing us with: Lots of useful SEO info at a glance; Quick access to more SEO tools and resources; Why do you need to choose? Toolbars take much space and also slow down your FireFox. Therefore I can afford to use no more than one SEO toolbar per FireFox profile. How to compare? I’ve compiled a quick comparison table (you knew I would) and added some notes below. You are more than welcome to share your own take. Note: this comparison table is not meant to determine which one is better / worse. Instead, it aims at helping you choose the one that best fits your needs. Note: I am describing features available by default. The tools can be configured to some extent, for example SEOquake allows to add almost any data (if you have at least some technical skills). Major features SEOBook SEO toolbar SEOmoz toolbar SEOquake toolbar Quick page SEO report Yes (with export feature) No Yes (with ‘print’ option) 2 or more sites comparison Yes (with export feature) No Yes (with export feature) Google Google PR Yes Yes Yes Link to Google cache Yes (and to text cache) No Yes Link to Google index No No Yes Backlinks Yahoo backlinks to the page and to the domain Number of back-linking pages and domains per Linkscape Yahoo backlinks to the page and to the domain Outbound links No No Yes (detailed report when clicked) Dmoz, Yahoo directory, BOTW Yes No No Competitors’ research Quick access to Quancast, Compete, Alexa, SEMrush, Google trends No No Archive.org data Yes No Yes Traffic Compete.com uniques and SEMrush traffic value No Alexa rank and SEMrush traffic value Whois info Yes Yes Yes Link to source Yes No Yes Export Yes (both site report and site comparison) No Yes Nofollow visualization Yes...Read More..