NewsGuard is a subscription-based tool designed for Firefox users that provides reliability ratings for news and information sources. Aimed at combating misinformation, it presents users with trust scores and detailed reports on various news websites. The service evaluates sites based on nine apolitical journalistic criteria, ensuring a thorough assessment of credibility. Each website's rating is accompanied by a Nutrition Label that outlines ownership, financing, content practices, and transparency. It covers the majority of online news sources, accounting for 95% of user engagement.

This tool is particularly useful for individuals seeking to navigate the complex landscape of digital news, helping them make informed decisions about the sources they choose to follow. The ratings range from “High Credibility” to “Proceed with Caution,” providing clear guidance on the reliability of each site. NewsGuard is intended for personal use only, ensuring that users have access to trustworthy information without the influence of commercial interests.