# browser-extension

Google's Core Web Vitals extension

Enterprise monitoring and observability platform that unifies logs, metrics, traces, and security data in a single dashboard. AI-powered anomaly detection and automated root cause analysis help teams resolve incidents faster. Integrates with 750+ technologies out of the box, making it the comprehensive observability solution for complex distributed systems.

Website technology lookup

Open-source monitoring and alerting toolkit originally built at SoundCloud. The standard for metrics collection in cloud-native environments with a powerful query language (PromQL), time-series database, and flexible alerting rules. Core component of the CNCF ecosystem, often paired with Grafana for visualization across Kubernetes and microservice architectures.

Developer news aggregator

Open-source analytics and interactive visualization platform. Create dashboards from dozens of data sources including Prometheus, Elasticsearch, PostgreSQL, and InfluxDB. The most popular observability dashboard with 65k+ GitHub stars, offering alerting, annotations, and a vast plugin ecosystem that makes it the universal frontend for infrastructure and application monitoring.

Hundreds of GitHub UI enhancements

Open-source browser extension with hundreds of small UX improvements to GitHub: cleaner diffs, one-click PR merging, reaction avatars, linkified commit SHAs, and much more. Fixes dozens of long-standing GitHub UI annoyances that power users encounter daily, making the GitHub web experience feel polished and efficient without waiting for official feature updates.

GitHub code navigation sidebar

Browser extension that adds a file tree sidebar to GitHub repositories for easy code navigation. Browse files and folders without leaving the current page, with support for private repos, pull request code review navigation, file search, bookmarks, and theming. Works with GitHub Enterprise. Available for Chrome, Firefox, Safari, and Edge. Essential for navigating large GitHub repos without cloning. Freemium with Pro features for advanced code review and multiple GitHub accounts.

Pretty-print JSON in the browser

Open-source browser extension that automatically pretty-prints JSON responses in the browser tab. Supports collapsible nodes, syntax highlighting, and raw/formatted toggle. Essential developer tool for anyone who works with APIs regularly, turning unreadable JSON blobs into navigable, color-coded trees that make debugging API responses significantly faster and less error-prone.

Time-travel debugging for Redux

Browser extension for inspecting and debugging Redux state management in React applications. Features time-travel debugging to replay actions step-by-step, state diff viewer showing exactly what changed, action log with payload inspection, state import/export, and ability to dispatch actions manually. Supports Redux Toolkit and legacy Redux. Available for Chrome, Firefox, and as a standalone Electron app. Essential for debugging complex Redux state flows in production and development.

Web page quality auditing

Google's open-source automated tool for auditing web page performance, accessibility, SEO, best practices, and Progressive Web App compliance. Generates detailed reports with actionable improvement suggestions and scores from 0-100 for each category. Built into Chrome DevTools, available as a CLI tool, Node.js module, and via PageSpeed Insights web interface. Essential for web performance optimization and meeting Core Web Vitals thresholds that affect Google search rankings.

Identify web technologies

Technology detection tool that identifies the tech stack behind any website — frameworks, CMS, analytics, CDNs, payment processors, and 1,500+ other technologies. Available as a browser extension (Chrome, Firefox, Edge), API, CLI, and bulk lookup service. Useful for competitive analysis, sales prospecting, lead enrichment, and technology trend research. Acquired by Crimson Hexagon (now Brandwatch). Free browser extension with paid API and enterprise tiers for large-scale lookups.

Debug Vue.js applications

Official browser DevTools extension for Vue.js providing deep inspection of component trees, reactive state, props, events, and slots. Includes Pinia/Vuex store debugging with time-travel, Vue Router inspection, performance timeline, and component highlighting. Works with Vue 2 and Vue 3. Available for Chrome and Firefox with standalone Electron app. Essential for debugging reactivity and understanding component hierarchies in Vue applications.

Inspect React component trees

Official browser extension by Meta for inspecting and debugging React component trees, props, state, hooks, and context in real-time. Features component highlighting on hover, profiler for measuring render performance and identifying bottlenecks, and component search/filtering. Supports React 16+ including Suspense, error boundaries, and concurrent features. Available for Chrome and Firefox. Essential for debugging re-renders, state management issues, and understanding component hierarchies.