Examine source code of What-If GradeSpeed

{
  "name": "What-If GradeSpeed",
  "manifest_version": 2,
  "version": "1.3resigned1",
  "description": "Allows for hypothetical calculation of grades for assignments in HISD's gradespeed portal.",
  "icons": {
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://parent.gradebook.houstonisd.org/pc/ParentStudentGrades.aspx*",
        "*://apps.houstonisd.org/ParentStudentConnect/GradeSpeed.aspx"
      ],
      "js": [
        "jquery.js",
        "whatif.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{94a02f41-2e01-41b0-a4bf-8363a5212221}"
    }
  }
}