Examine source code of Free Cookie Editor

{
  "manifest_version": 2,
  "version": "1.0.2",
  "name": "Free Cookie Editor",
  "description": "Simple, fast cookie editor that helps you edit cookies right in your browser, right at the tab you're using.",
  "icons": {
    "16": "data/icons/icon-16.png",
    "32": "data/icons/icon-32.png",
    "48": "data/icons/icon-48.png",
    "64": "data/icons/icon-64.png",
    "128": "data/icons/icon-128.png",
    "256": "data/icons/icon-256.png"
  },
  "permissions": [
    "cookies",
    "storage",
    "notifications",
    "contextMenus",
    "*://*/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "data/icons/icon-16.png",
      "32": "data/icons/icon-32.png",
      "48": "data/icons/icon-48.png",
      "64": "data/icons/icon-64.png"
    },
    "default_popup": "data/popup/index.html"
  },
  "homepage_url": "https://cookie-editor.freebusinessapps.net/",
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  },
  "applications": {
    "gecko": {
      "id": "{654645d7-a69d-43dc-854c-34b56377cf8b}",
      "strict_min_version": "57.0"
    }
  }
}