Examine source code of WebDav plugin for office

{
  "manifest_version": 2,
  "name": "WebDav plugin for office",
  "description": "Allows to edit OpenOffice or LibreOffice docs with help webdav protocol",
  "version": "1.8.4resigned1",
  "applications": {
    "gecko": {
      "id": "openoffice@goodsoft.com",
      "strict_min_version": "50.0"
    }
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "content_scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/script.js"
      ]
    }
  ],
  "options_ui": {
    "page": "settings/options.html"
  },
  "permissions": [
    "storage",
    "nativeMessaging",
    "tabs"
  ]
}