Examine source code of 1 ⭐ Review Tour

{
  "manifest_version": 2,
  "name": "1 ⭐ Review Tour - The Browser Extension",
  "short_name": "1 ⭐ Review Tour",
  "description": "This extension sucks!!!! Not even worth reviewing it. This browser based artwork shows only 1 ⭐ reviews on Google Maps.",
  "author": "!Mediengruppe Bitnik, Selena Savić  & Gordan Savičić",
  "version": "0.2",
  "icons": {
    "128": "icons/icon_on.png"
  },
  "web_accessible_resources": [
    "icons/icon_off.png",
    "icons/icon_on.png",
    "icons/star_gray.svg",
    "icons/star.svg",
    "icons/stars-border.svg"
  ],
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "icons/icon_off.png",
    "default_title": "1 ⭐ Review Tour - the browser extension"
  },
  "applications": {
    "gecko": {
      "id": "1-star-review@Tours",
      "strict_min_version": "113.0"
    }
  }
}