Examine source code of Token Detective

{
  "manifest_version": 2,
  "name": "Token Detective",
  "version": "1.2",
  "description": "It checks for authorization headers to get bearer tokens from the HTTP Requests.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "erenn.uygun@info.com",
      "strict_min_version": "42.0"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "web_accessible_resources": [
    "popup.html",
    "popup.js",
    "download.js"
  ]
}