Examine source code of WikiCamp Tracker

{
  "name": "WikiCamp Tracker",
  "description": "Sends Wikipedia history to WikiCamp",
  "version": "1.4resigned1",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://wiki.camp/*"
      ],
      "js": [
        "auth-content.js"
      ]
    },
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "js": [
        "visit-content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "applications": {
    "gecko": {
      "id": "ext@wiki.camp"
    }
  },
  "manifest_version": 2
}