Examine source code of Nuxeo Dev Tools

{
  "manifest_version": 2,
  "name": "Nuxeo Dev Tools",
  "version": "3.1.5",
  "description": "",
  "icons": {
    "48": "images/nuxeo-48.png",
    "96": "images/nuxeo-96.png"
  },
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "firefox_nuxeodevtools@nuxeo.com",
      "strict_min_version": "48.0"
    }
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/nuxeo-16.png",
      "19": "images/nuxeo-19.png",
      "32": "images/nuxeo-32.png",
      "38": "images/nuxeo-38.png"
    },
    "default_title": "Nuxeo Dev Tools",
    "default_popup": "popup.html",
    "browser_style": true
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "activeTab",
    "https://ajax.googleapis.com/",
    "notifications",
    "webRequest",
    "<all_urls>",
    "cookies",
    "https://app.prodpad.com/",
    "storage",
    "webRequestBlocking"
  ]
}