Custom JavaScript for Websites

Custom JS Injector allows you to run your own JavaScript code on any website. You can write, inject, and store custom scripts per domain — all from a clean, intuitive popup interface. ✨ **Features**: - 💻 Inject JavaScript into any website via popup UI - 💾 Automatically saves your script per domain - 🔁 Auto-inject on page reload — no need to click again - 🔒 Scripts are stored locally (no remote sync or upload) - 🧠 No external dependencies, no bloat — just pure custom JS! 🚀 **Use Cases**: - Debug page behavior or experiment with ideas - Clean up UI or hide elements - Extract data from web apps or dashboards - Apply personal UI/UX fixes on internal tools 📝 **Important Notice – Website Restrictions**: This extension **does not work** on some websites that actively block JavaScript injection through browser-level security mechanisms like **Content Security Policy (CSP)**. These websites include, but are not limited to: - `google.com` - `facebook.com` - `twitter.com` - `chrome.google.com` Due to these restrictions, the extension’s inject feature will **not function** on those sites. This is expected behavior, and not a bug or issue with the extension. To test or use this extension, please try it on other websites that do not have strict CSP rules — such as: - `example.com` - `wikipedia.org` - internal tools or custom dashboards 📌 **Privacy**: This extension only uses local storage. **No data is shared, synced, or uploaded remotely.**