Examine source code of Chuck Norris Jokes

{
  "manifest_version": 2,
  "name": "Chuck Norris Jokes",
  "description": "Get a brand new Chuck Norris Jokes for every new tab! Jokes from https://api.chucknorris.io/.",
  "version": "0.0.1",
  "icons": {
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "chuck-norris-jokes@yalini.yalu"
    }
  },
  "options_ui": {
    "page": "options/index.html"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "storage"
  ]
}