Examine source code of Web Marker

{
  "manifest_version" : 3 ,
  "name" : "WebMarker — Draw, Highlight & Mark Up Pages",
  "version" : "1.1.0",
  "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": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}