Examine source code of ImageSlim: Image Resizer

{
  "manifest_version": 3,
  "name": "ImageSlim: Resize & Optimize Images",
  "version": "1.0",
  "description": "Instantly resize and optimize images in your browser. Save storage space and improve website loading times with just a few clicks.",
  "author": "getinfotoyou",
  "browser_specific_settings": {
    "gecko": {
      "id": "imageslimaddon@getinfotoyou.blogspot.com",
      "strict_min_version": "58.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  }
}