Examine source code of Dice & Random Picker

{
  "manifest_version": 2,
  "name": "Dice & Random Picker",
  "version": "1.4.0",
  "description": "Your pocket randomizer. Roll dice with standard notation like 2d6+3, pick a number in a range, flip a coin, or drop in a list to pick a winner or shuffle it. Simple, fast, and offline.",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2f6a525-5c4d-4238-8211-c7de597fae25}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [],
  "browser_action": {
    "default_title": "Dice & Random Picker",
    "default_popup": "src/popup.html",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    }
  }
}