Examine source code of GitHub Buttons on Mobile

{
  "manifest_version": 2,
  "name": "github-buttons-mobile",
  "version": "0.0.6resigned1",
  "description": "A Firefox addon to add \"watch\" and \"star\" buttons to the mobile version of GitHub.",
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "js": [
        "data/inject.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@github-buttons-mobile"
    }
  }
}