Examine source code of Web Marker— Draw, Highlight & Mark Up The Web

{
  "manifest_version": 3,
  "name": "WebMarker— Draw, Highlight & Mark Up The Web",
  "version": "1.0.0",
  "description": "A premium, privacy-first pen for the web — draw, highlight and annotate any page, then save or screenshot your notes.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "WebMarker — click to draw on this page"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+W"
      },
      "description": "Toggle WebMarker on the current page"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "webmarker@yourdomain.example",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}