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Site Information Tool 1.2.1-signed
Provides information about a webpage (or website) including rankings, domain registration data (whois), IP information, server response and page data, thumbnail and more.
About this Add-on
+ Rankings information (Google PageRank, Alexa rank, Compete.com rank, Quantcast rank, Technorati rank)
+ IP address information (IP, network name & range, country)
+ Linking information (indexed pages count, inbound links count, etc.)
+ Server response headers
+ Page information (title, meta tags, size)
+ This page in social networks (del.icio.us, digg.com)
+ Domain whois information (domain nameservers, registrant & owner information)
+ Feed subscribers count
+ List of top performing keywords in Google
+ Competitors list