Examine source code of ace Document Control

{
  "manifest_version": 2,
  "name": "ace Document Control",
  "description": "Web browser extension for the ace DocumentControl Workspace",
  "version": "2.8.0.0",
  "author": "ace Neue Informationstechnologien GmbH",
  "homepage_url": "http://www.ace.at",
  "icons": {
    "48": "icon48.png"
  },
  "applications": {
    "gecko": {
      "id": "aceDoc2@ace.at",
      "strict_min_version": "52.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "acedoc-content.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "acedoc-background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "activeTab",
    "nativeMessaging",
    "<all_urls>"
  ]
}