MozBar provides quick access to the key SEO metrics of websites and SERps as you serf the web. You see Page Authority (PA) and Domain Authority (DA) for each website you visit and all Google search results, which is extremely helpful for the competition asessment.

MozBar features and use cases:

• See SERP overlay with detailed metrics
• Page analysis overlay
• Links and keywords highlight
• See important SEO metrics as you surf the web
• Create custom searches by search engine, country, region or city
• See how difficult it is to rank for a given keyword
• Expose page elements with the Analyze Page overlay
• Preview and validate authorship, schema.org, and other markup inside the browser
• View social metrics for Facebook, Twitter, and Google+