Examine source code of GitHub Mobile Code Wrap

{
  "manifest_version": 2,
  "name": "GitHub Mobile Code Wrap",
  "version": "0.0.2resigned1",
  "description": "A Firefox add-on to wrap long line code in GitHub mobile site.",
  "applications": {
    "gecko": {
      "id": "github-mobile-code-wrap@gluons.github.io",
      "strict_min_version": "48.0"
    }
  },
  "author": "Saran Tanpituckpong",
  "homepage_url": "https://gitlab.com/gluons/github-mobile-code-wrap",
  "permissions": [
    "https://github.com/*",
    "https://gist.github.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*",
        "https://gist.github.com/*"
      ],
      "run_at": "document_start",
      "css": [
        "./main.css"
      ]
    }
  ]
}