Examine source code of MediaPiper

{
  "manifest_version": 2,
  "name": "MediaPiper",
  "description": "Hover any image to preview full-size. Discovers high-res media patterns automatically on any site.",
  "version": "1.4.3",
  "icons": {
    "16": "/icon/16.png",
    "32": "/icon/32.png",
    "48": "/icon/48.png",
    "96": "/icon/96.png",
    "128": "/icon/128.png",
    "512": "/icon/512.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "clipboardWrite",
    "alarms",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mediapiper@modelpiper.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "MediaPiper",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}