Some cool SEO tools for Firefox

Meta Tag Analyzer
Meta Tag Analyzer examines the Meta information of the given URL and lets you know if the content is Search Engine Friendly or not. Find it here
From: www.rankquest.com Author: Vincent S Brown

Keyword Suggestions for Google
SEO Tools - Keyword Suggestions for Google. Find it here
From: www.seochat.com Author: Thaminda Wijeratne

Link Explorer
Link Explorer, Explores links in the URL provided and creates a tree view of the same. Find it here
From: www.rankquest.com Author: Vincent S Brown

Backlink
Find all sites that link to this page (i.e., backlinks). Find it here
From: www.cs.umass.edu Author: Guray Alsac

Keyword Finder
Keyword Finder lists the keywords present in meta keyword tag of given url / site. Find it here
From: www.rankquest.com Author: Vincent S Brown