Examine source code of Heute

{
  "manifest_version": 2,
  "name": "Heute",
  "version": "1.4resigned1",
  "author": "Enrico Lumetti",
  "description": "Stop procrastination by setting time limits on browsing.",
  "icons": {},
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage",
    "alarms"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "countdown_overlay.js"
      ],
      "css": [
        "countdown_overlay.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "heute.js"
    ]
  },
  "web_accessible_resources": [
    "landing.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac14537d-163c-4059-b96b-ee33a727a871}"
    }
  }
}