Examine source code of Canvas Grade Viewer

{
  "manifest_version": 2,
  "name": "Canvas Grade Viewer",
  "description": "This extension lets you view your canvas grade average per class, even when total grades are disabled.",
  "version": "1.9.2",
  "author": "Ethan Vazquez",
  "icons": {
    "48": "icon38.png"
  },
  "browser_action": {
    "default_title": "Canvas Grade Viewer",
    "default_icon": {
      "19": "icon20.png",
      "20": "icon20.png",
      "38": "icon38.png"
    },
    "default_popup": "dashboard.html"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "*://*.instructure.com/courses/*/grades*"
      ],
      "js": [
        "canvasgradeviewer.client.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "storage"
  ]
}