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+# YouTube Thumbnail Blur Extension
+
+## Overview
+This Chrome extension automatically blurs YouTube thumbnails and reveals them on hover, providing a more focused browsing experience. When installed, all YouTube thumbnails will be blurred by default and will become clear when you mouse over them.
+
+## Features
+- Automatically blurs all YouTube thumbnails
+- Smooth transition effect when hovering over thumbnails
+- Works with dynamically loaded content
+- Handles YouTube's single-page navigation
+- 5-second delay to ensure proper thumbnail loading
+- Lightweight and performance-friendly
+
+## Installation
+
+### Developer Mode
+1. Download or clone this repository
+2. Open Chrome and go to `chrome://extensions/`
+3. Enable "Developer mode" in the top right
+4. Click "Load unpacked"
+5. Select the folder containing the extension files
+
+### Files Needed
+- `manifest.json`
+- `content.js` 
+
+## How It Works
+The extension:
+1. Waits 5 seconds after page load to ensure all content is properly loaded
+2. Applies a blur effect to all YouTube thumbnails
+3. Removes the blur when you hover over a thumbnail
+4. Reapplies the blur when you move your mouse away
+5. Automatically handles newly loaded thumbnails as you scroll
+
+## Configuration
+You can modify these values in `content.js` to customize the extension:
+- Blur intensity: Change `blur(5px)` to your preferred value
+- Initial delay: Adjust the `5000` millisecond delay
+- Transition speed: Modify the `0.3s` transition timing
+
+## Technical Details
+The extension uses:
+- MutationObserver to track dynamically loaded content
+- YouTube's `yt-navigate-finish` event for page navigation
+- CSS transitions for smooth blur effects
+- Dataset attributes to prevent duplicate processing
+
+## Troubleshooting
+If thumbnails aren't blurring:
+1. Make sure the extension is enabled
+2. Try refreshing the page
+3. Check if you're on a YouTube page
+4. Verify that Developer mode is enabled
+
+## Contributing
+Feel free to submit issues and pull requests for:
+- Bug fixes
+- Performance improvements
+- New features
+- Documentation improvements
+
+## License
+MIT License - Feel free to use and modify as needed
+
+## Version
+1.0.0
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diff --git a/submissions/FocusLens/content.js b/submissions/FocusLens/content.js
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+const addBlurEffect = () => {
+  const thumbnails = document.querySelectorAll('img');
+  
+  thumbnails.forEach(thumbnail => {
+    if (!thumbnail.dataset.blurApplied) {
+      thumbnail.style.filter = "blur(5px)";
+      thumbnail.style.transition = "filter 0.3s ease";
+      
+      thumbnail.addEventListener('mouseenter', () => {
+        thumbnail.style.filter = "blur(0)";
+      });
+      
+      thumbnail.addEventListener('mouseleave', () => {
+        thumbnail.style.filter = "blur(5px)";
+      });
+      
+      thumbnail.dataset.blurApplied = "true";
+    }
+  });
+};
+
+const startBlurProcess = () => {
+  setTimeout(() => {
+    addBlurEffect();
+    
+    const observer = new MutationObserver((mutations) => {
+      setTimeout(addBlurEffect, 100);
+    });
+    
+    observer.observe(document.body, {
+      childList: true,
+      subtree: true
+    });
+  }, 5000);  
+};
+
+startBlurProcess();
+
+window.addEventListener('yt-navigate-finish', () => {
+  startBlurProcess();
+});
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diff --git a/submissions/FocusLens/manifest.json b/submissions/FocusLens/manifest.json
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+{
+  "manifest_version": 3,
+  "name": "FocusLens",
+  "version": "1.0",
+  "description": "An extension that blurs the thumbnail of YT video until I hover on it",
+  "host_permissions": ["https://www.youtube.com/*"],
+  "permissions": ["scripting", "activeTab"],
+  "content_scripts": [
+    {
+      "matches": ["https://www.youtube.com/*"],
+      "js": ["content.js"]
+    }
+  ],
+  "web_accessible_resources": [{
+    "resources": ["images/*.jpg"],
+    "matches": ["https://www.youtube.com/*"]
+  }]
+}