Examine source code of Random Wikipedia Button

{
  "manifest_version": 2,
  "name": "Random Wikipedia Button",
  "version": "1.0",
  "description": "Opens a random Wikipedia article.",
  "browser_action": {
    "default_icon": {
      "64": "icon64.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2781eff9-5167-4c0f-aa4d-be034e6d6dab}",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  }
}