Examine source code of Emoji-fy Page

{
  "manifest_version": 2,
  "name": "Emoji-fy Page",
  "version": "2.2.1.0",
  "description": "Add a little joy to any page by dropping matching emoji next to words like cat, coffee, fire or rocket. A generosity slider controls how often it happens, and Restore puts the text back.",
  "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": "{c83b1ca2-2fc3-468c-9d70-977c9d283502}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Emoji-fy Page",
    "default_popup": "src/popup.html",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    }
  }
}