Examine source code of CONTENS CMS Connector

{
  "manifest_version": 2,
  "name": "ContensConnector",
  "version": "3.0.1resigned1",
  "description": "Link to page in Contens CMS backend.",
  "icons": {
    "32": "data/icon-16.png",
    "48": "data/icon-48.png",
    "128": "data/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "CONTENS Editor Tool",
    "default_icon": {
      "32": "data/icon-16.png",
      "48": "data/icon-48.png",
      "128": "data/icon-128.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "applications": {
    "gecko": {
      "id": "browserconnector@contens.de"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "*://*/*",
    "file:///*/*"
  ]
}