Examine source code of Wikimedia Commons Search

{
  "manifest_version": 2,
  "name": "Wikimedia Commons search",
  "description": "Search for media related to the highlighted text on Wikimedia Commons",
  "version": "1.0.0",
  "developer": {
    "name": "upollo",
    "url": "https://junglenut.org/firefox-addons/"
  },
  "applications": {
    "gecko": {
      "id": "upollo@junglenut.org"
    }
  },
  "icons": {
    "32": "icons/wikimedia-32.png",
    "48": "icons/wikimedia-48.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}