Examine source code of Go Doc Tooltip

{
  "manifest_version": 2,
  "name": "Go Doc Tooltip",
  "short_name": "gdt",
  "version": "0.0.5resigned1",
  "description": "Show go doc's function description as tooltip of function list",
  "author": "butaixianran",
  "icons": {
    "128": "icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://golang.org/pkg/*",
        "https://godoc.org/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bb278769-d4b8-4d4a-934e-56eddb5d956a}"
    }
  }
}