Seen Or Not

A lightweight Chrome extension that instantly tells you whether you have seen a page before.

✨ Features

• 🟢 NEW — First time visiting the page
• 🔴 SEEN — Page has been visited earlier
• 🔵 HOME — New tab, bookmarks, or internal pages
• Badge appears immediately on navigation request
• Badge never disappears
• No popup, no UI, zero lag
• NEW remains until tab is refreshed or closed

🚀 Installation

1. Clone or download this repository
2. Open Chrome and go to chrome://extensions
3. Enable Developer Mode
4. Click Load unpacked
5. Select the seen-or-not folder

🧠 How It Works

• Uses webNavigation.onBeforeNavigate for instant detection
• Tracks per-tab state to avoid tab-switch bugs
• Re-applies badge on tab activation to prevent Chrome clearing it
• Stores visited URLs locally using chrome.storage

📤 Export / 📥 Import

Click the extension icon to open the control panel.

• Export URLs → downloads a JSON file
• Import URLs → merge URLs from a JSON file
• Clear All → deletes all stored URLs