Examine source code of Selective D&P

{
  "manifest_version": 2,
  "name": "Selective D&P",
  "version": "1.3",
  "description": "Disables the Protanopia & Deuteranopia mode for select elements on github",
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "js": [
        "colorChanger.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{be2d499a-e6da-43fd-9fbc-ea9d796e17f8}"
    }
  }
}