W3C (x)HTML Validator - 0.2
by davidboiss
Display one of 3 icons (valid, warning(s), error(s)) in navigation bar related to validity of (x)HTML document currently shown. Errors/warnings can be displayed as page popup or..
 
Csscan - 2.0.1
by stijnstijn
Offers a quick overview of CSS properties to the element the mouse cursor is hovering.
 
SEO Site Tools - 2.57
by cartercole
Pulls PageRank, domain links and rank metrics, aggrigates social media reactions from Twitter, Facebook, Digg and SEO releated tags
 
Site Information Tool - 1.0
by wmtips.com
Shows information about the current page (PageRank, Alexa rank, IP info, server response headers, whois and other SEO parameters)
 
IPcopy - 1.4
by maxmumford
The only IP extension that allows you to automatically copy your IP to your clipboard with just one click.
 
Domain Availability Checker - 1.5
by seoheap
This extension checks the availability of a domain name. What’s the point of to another page when you can check it from your toolbar.
 
BulkPageRank - 1.1
by seoheap
This extension retrieves the PageRank for all the http links on that page. It is handy for checking which directory category to place your link in for maximum benefit or maybe you ..
 
iPageRank - 1.1.5
by seoheap
Unlike all the other PageRank checkers, this one will tell you, how much PR will be transfered to your site with a dofollow link on that page. It is handy to see if a site would..
 
Search Drupal - 0.1.1
by arshadchummun
Search drupal.org and the drupal api quickly.
 
SitezMeter - 0.4.1
by kuber
This browser companion provides users with extensive information about web sites traffic - instantly find out how popular a web site is, its rank, and how fast it is growing. Si..