Examine source code of Cookie-Editor by IMS

{
  "manifest_version": 2,
  "name": "Cookie-Editor by IMS",
  "version": "1.0.0",
  "description": "Very Simple and a powerful Cookie Editor that allow you to quickly create, edit and delete cookies without leaving your tab.",
  "background": {
    "scripts": [
      "interface/lib/browserDetector.js",
      "cookie-editor.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/cookie-filled-small.svg",
      "32": "icons/cookie-filled-small.svg",
      "48": "icons/cookie-filled.svg",
      "128": "icons/cookie-filled.svg"
    },
    "theme_icons": [
      {
        "light": "icons/cookie-light-small.svg",
        "dark": "icons/cookie-small.svg",
        "size": 16
      },
      {
        "light": "icons/cookie-light-small.svg",
        "dark": "icons/cookie-small.svg",
        "size": 32
      },
      {
        "light": "icons/cookie-light.svg",
        "dark": "icons/cookie.svg",
        "size": 128
      }
    ],
    "default_title": "Cookie-Editor",
    "default_popup": "interface/popup/cookie-list.html"
  },
  "devtools_page": "interface/devtools/devtool.html",
  "permissions": [
    "cookies",
    "<all_urls>",
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icons/cookie-filled-small.svg",
    "19": "icons/cookie-filled-small.svg",
    "32": "icons/cookie-filled-small.svg",
    "48": "icons/cookie-filled.svg",
    "128": "icons/cookie-filled.svg"
  }
}