Examine source code of Tab Mover

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "9",
  "description": "__MSG_extensionDescription__",
  "author": "Guido Berhoerster",
  "homepage_url": "https://code.guido-berhoerster.org/addons/firefox-addons/tab-mover/",
  "applications": {
    "gecko": {
      "id": "tab-mover@code.guido-berhoerster.org",
      "strict_min_version": "60.0"
    }
  },
  "icons": {
    "48": "icons/tab-mover-48.png",
    "96": "icons/tab-mover-96.png"
  },
  "default_locale": "en",
  "permissions": [
    "menus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}