Examine source code of ConnectMe Deskshare

{
  "description": "The ConnectMe Deskshare add-on is required for Screen sharing feature in Streams application. Native app required for this add-on is UC-Extensions. User can install the ConnectMe Deskshare add-on and start using it immediately. On installing the add-on a moderator can share screen with others and also give mouse control to others.",
  "manifest_version": 2,
  "name": "ConnectMe Deskshare",
  "version": "1.11resigned1",
  "icons": {
    "48": "icon48.png"
  },
  "applications": {
    "gecko": {
      "id": "{d3ef2985-cbf1-4852-96e0-05b196b35c2f}",
      "strict_min_version": "50.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.streams.us/*",
        "https://*.unifiedcloudit.com/*",
        "https://*.wspbx.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon48.png"
  },
  "permissions": [
    "nativeMessaging",
    "https://*.streams.us/*",
    "https://*.unifiedcloudit.com/*",
    "https://*.wspbx.com/*"
  ]
}