Examine source code of Error indicator

{
  "manifest_version": 2,
  "name": "Error indicator",
  "description": "Provides common place for reporting errors.",
  "version": "2",
  "default_locale": "en",
  "permissions": [
    "storage",
    "webRequest",
    "<all_urls>"
  ],
  "icons": {
    "32": "icons/error.svg"
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "report.html",
    "default_icon": {
      "16": "icons/ok.svg"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "window-error-details.js",
        "console-error-details.js",
        "page-observer.js",
        "content-script.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "date-provider.js",
      "error-indicator.js",
      "tab-error.js",
      "background-listener.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d1dedae8-51d2-4bc1-bc93-423a2c1b3d29}"
    }
  }
}