Examine source code of Monastery

{
  "manifest_version": 2,
  "name": "Monastery",
  "version": "1.3.3resigned1",
  "applications": {
    "gecko": {
      "id": "monastery@omivore.com",
      "strict_min_version": "42.0"
    }
  },
  "description": "Monastery restricts your browsing session and blocks and limits time spent on a user-supplied blacklist.",
  "homepage_url": "https://github.com/omivore/monastery",
  "icons": {
    "48": "icons/monastery.svg"
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "notifications",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/monastery.svg",
    "default_title": "Monastery",
    "default_popup": "popup/status_panel.html",
    "browser_style": false
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false
  }
}