Examine source code of Image by Type

{
  "manifest_version": 2,
  "name": "Image Saver",
  "version": "1.0",
  "description": "Save images in different formats.",
  "permissions": [
    "contextMenus",
    "downloads",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb878dce-c83a-4950-b0f0-525b50fe5159}"
    }
  }
}