Examine source code of API Error Logger

{
  "manifest_version": 2,
  "name": "API Error Logger",
  "version": "0.1.5",
  "permissions": [
    "storage",
    "downloads",
    "notifications",
    "activeTab",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.svg"
    }
  },
  "icons": {
    "48": "icon48.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "web_accessible_resources": [
    "inpage.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{535752e0-60fa-4478-bd6a-f98c78657250}"
    }
  }
}