Examine source code of AliExpress Quick Button

{
  "manifest_version": 2,
  "version": "1.0.24",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/ali-16.png",
    "32": "icons/ali-32.png",
    "48": "icons/ali-48.png",
    "64": "icons/ali-64.png",
    "96": "icons/ali-96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/ali-16.png",
    "default_title": "__MSG_browserActionTitle__"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-ilDcbn064aGYpg@jetpack"
    }
  }
}