Examine source code of Canvas Course Sidebar

{
  "manifest_version": 2,
  "name": "Canvas Course Sidebar",
  "description": "Adds Canvas courses to your Canvas sidebar to make them easier to access",
  "version": "0.1.5",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{72be0b0b-6587-478c-98a6-f500bad51c4c}"
    }
  },
  "browser_action": {
    "default_title": "Canvas Sidebar",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instructure.com/*"
      ],
      "run_at": "document_start",
      "css": [
        "content-scripts/content.css"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}