Examine source code of TikTok Counter

{
  "manifest_version": 2,
  "name": "TikTok Counter",
  "version": "1.0",
  "description": "Counts TikTok followers.",
  "icons": {
    "48": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "webRequest",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7729b1e4-81d7-44c8-aaac-3e71dc9c51e7}"
    }
  }
}