Examine source code of Canvas Due Date Shifter

{
  "manifest_version": 3,
  "name": "Canvas Due Date Shifter",
  "version": "1.2.2",
  "description": "Displays Canvas due dates shifted by a random number of hours (stable per assignment). Display-only: never changes real deadlines.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Canvas Due Date Shifter"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2870cd50-30eb-4598-929d-30765d5019b2}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.instructure.com/*",
        "https://*.canvas.com/*"
      ],
      "js": [
        "defaults.js",
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ]
}