Examine source code of MODX Queeg

{
  "name": "MODX Queeg",
  "description": "Tiny extension that provides a one click access to MODX Resources from a website to its manager.",
  "version": "2.0.1resigned1",
  "short_name": "MODX Queeg",
  "author": "Lukas Bartak (bartweb.cz)",
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "page": "background.html"
  },
  "applications": {
    "gecko": {
      "strict_min_version": "49.0",
      "id": "{6cd6277e-b783-4676-94b5-955e3521ac59}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "MODX Queeg",
    "default_icon": {
      "19": "images/icon-grey19.png",
      "38": "images/icon-grey38.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "manifest_version": 2
}