The Mangools SEO extension for Firefox is designed for web developers and SEO professionals, offering a suite of tools that enhance the analysis of website performance directly from the browser. Key features include a domain authority checker that assesses website credibility using metrics from Moz and Majestic, as well as competitor keyword analysis that displays top-performing keywords, search volumes, and estimated traffic. Users can also access a backlink checker to evaluate competitor backlinks and a keyword density checker to analyze keyword usage on current pages.

Additionally, the extension provides tools for checking broken links, on-page SEO performance, and rank tracking for keywords. The integration of Google SERP features allows users to see SERP positions and access essential Mangools tools quickly. A 10-day free trial is available, with no credit card required, making it easy for users to explore its capabilities without commitment.