Examine source code of D2L Grades

{
  "manifest_version": 2,
  "name": "D2L Grades",
  "version": "1.1",
  "description": "Calculates grades straight from D2L!",
  "content_scripts": [
    {
      "matches": [
        "https://*/d2l/lms/grades/my_grades/main.d2l?ou=*"
      ],
      "js": [
        "d2lgrades.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff14fc18-8117-44d3-85c7-98716fefa714}"
    }
  }
}