Examine source code of DesModder for Desmos

{
  "name": "DesModder for Desmos",
  "description": "Supercharge your Desmos graph creation and sharing experience with many convenient features",
  "manifest_version": 2,
  "version": "0.15.11",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "DesModder"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.desmos.com/calculator*",
        "https://*.desmos.com/geometry*",
        "https://*.desmos.com/3d*",
        "https://*.desmos.com/notebook*"
      ],
      "run_at": "document_start",
      "js": [
        "preload/content.js"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "script.js",
    "preloadScript.js"
  ],
  "permissions": [
    "https://*.desmos.com/*",
    "https://wakatime.com/api/v1/users/current/heartbeats",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "DesModder@jared-hughes.github.io"
    }
  }
}