Examine source code of grasp

{
  "name": "grasp",
  "version": "1.0.2.2",
  "description": "Reliably capture links and webpage content in a plaintext file (org-mode/markdown)",
  "permissions": [
    "storage",
    "notifications",
    "activeTab",
    "scripting"
  ],
  "commands": {
    "capture-simple": {
      "description": "Quick capture: url, title and selection",
      "suggested_key": {
        "default": "Ctrl+Alt+H",
        "mac": "Command+Alt+H"
      }
    },
    "_execute_action": {
      "description": "Capture page, with extra information",
      "suggested_key": {
        "default": "Ctrl+Alt+Y",
        "mac": "Command+Alt+Y"
      }
    }
  },
  "optional_permissions": [],
  "manifest_version": 3,
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "icons": {
    "128": "img/unicorn.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "action": {
    "default_icon": "img/unicorn.png",
    "default_popup": "popup.html",
    "default_title": "Capture page, with extra information"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'"
  },
  "host_permissions": [
    "http://localhost/capture",
    "https://localhost/capture"
  ],
  "optional_host_permissions": [
    "http://*/capture",
    "https://*/capture"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{37e42980-a7c9-473c-96d5-13f18e0efc74}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}