Examine source code of MH+

{
  "manifest_version": 2,
  "name": "MH+",
  "description": "Improve the look of Minehut's dashboard.",
  "version": "1.3.2",
  "icons": {
    "48": "images/icon48.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "web_accessible_resources": [
    "css/*.css"
  ],
  "permissions": [
    "storage",
    "webNavigation",
    "scripting",
    "http://minehut.com/*",
    "https://minehut.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5272500f-becd-447b-9bdc-e1c0993c1734}"
    }
  }
}