PR Blocker is a free Chrome extension designed to assist developers in managing their pull requests effectively. This tool provides timely visual reminders of open PRs whenever users visit a repository's Pull Requests page or attempt to create a new PR. It helps prioritize existing work, ensuring developers do not overlook pending reviews. The extension features a modal popup displaying all open PRs, complete with repository names, titles, and the duration each has been open, which aids in keeping track of pending tasks.

Key features of PR Blocker include color-coded age tracking for pull requests, multi-user support for tracking PRs across different GitHub accounts, and customizable thresholds for notifications. Users can choose between soft and hard blocking modes, receive desktop notifications for PR activity, and even configure quiet hours to minimize distractions. The extension emphasizes user privacy, communicating only with GitHub's API without storing or sharing data externally.