DotGit is a free Firefox extension designed for web developers and IT professionals, enabling them to identify potential security vulnerabilities related to Git repositories on websites. It scans visited sites for the presence of common version control directories such as .git, .svn, and .hg, as well as configuration files like .env and .DS_Store. The tool can also help determine whether a site is open source by checking its presence on platforms like GitHub or GitLab, and it looks for security.txt files that may indicate a site's security policy.

The extension provides users with notifications upon detecting exposed folders and allows for easy downloading of the entire .git folder in a convenient zip format. DotGit features customizable options for colors, notifications, and downloads, ensuring a tailored experience. Users should note that some checks are disabled by default, which can be activated in the settings for a more thorough analysis.