Examine source code of Copy as Markdown

{
  "name": "Copy as Markdown",
  "version": "3.6.0",
  "manifest_version": 3,
  "description": "Copy Link or Image as Markdown code",
  "permissions": [
    "activeTab",
    "alarms",
    "contextMenus",
    "clipboardWrite",
    "scripting",
    "storage"
  ],
  "optional_permissions": [
    "bookmarks",
    "tabs",
    "tabGroups"
  ],
  "action": {
    "default_icon": {
      "128": "./dist/static/images/icon-128.png"
    },
    "default_title": "Copy as Markdown...",
    "default_popup": "./dist/static/popup.html"
  },
  "icons": {
    "16": "./dist/static/images/icon-16.png",
    "48": "./dist/static/images/icon-48.png",
    "128": "./dist/static/images/icon-128.png"
  },
  "background": {
    "scripts": [
      "hacks.js",
      "./dist/background.js"
    ],
    "type": "module"
  },
  "commands": {
    "selection-as-markdown": {
      "description": "Copy Selection as Markdown"
    },
    "current-tab-link": {
      "description": "current tab: [title](url)"
    },
    "current-tab-custom-format-1": {
      "description": "current tab: custom format 1"
    },
    "current-tab-custom-format-2": {
      "description": "current tab: custom format 2"
    },
    "current-tab-custom-format-3": {
      "description": "current tab: custom format 3"
    },
    "current-tab-custom-format-4": {
      "description": "current tab: custom format 4"
    },
    "current-tab-custom-format-5": {
      "description": "current tab: custom format 5"
    },
    "all-tabs-link-as-list": {
      "description": "all tabs: - [title](url)"
    },
    "all-tabs-link-as-task-list": {
      "description": "all tabs: - [ ] [title](url)"
    },
    "all-tabs-title-as-list": {
      "description": "all tabs: - title"
    },
    "all-tabs-url-as-list": {
      "description": "all tabs: - url"
    },
    "highlighted-tabs-link-as-list": {
      "description": "selected tabs: - [title](url)"
    },
    "highlighted-tabs-link-as-task-list": {
      "description": "selected tabs: - [ ] [title](url)"
    },
    "highlighted-tabs-title-as-list": {
      "description": "selected tabs: - title"
    },
    "highlighted-tabs-url-as-list": {
      "description": "selected tabs: - url"
    },
    "all-tabs-custom-format-1": {
      "description": "all tabs: custom format 1"
    },
    "all-tabs-custom-format-2": {
      "description": "all tabs: custom format 2"
    },
    "all-tabs-custom-format-3": {
      "description": "all tabs: custom format 3"
    },
    "all-tabs-custom-format-4": {
      "description": "all tabs: custom format 4"
    },
    "all-tabs-custom-format-5": {
      "description": "all tabs: custom format 5"
    },
    "highlighted-tabs-custom-format-1": {
      "description": "selected tabs: custom format 1"
    },
    "highlighted-tabs-custom-format-2": {
      "description": "selected tabs: custom format 2"
    },
    "highlighted-tabs-custom-format-3": {
      "description": "selected tabs: custom format 3"
    },
    "highlighted-tabs-custom-format-4": {
      "description": "selected tabs: custom format 4"
    },
    "highlighted-tabs-custom-format-5": {
      "description": "selected tabs: custom format 5"
    }
  },
  "options_ui": {
    "page": "./dist/static/options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "dist/vendor/turndown.mjs",
        "dist/vendor/turndown-plugin-gfm.mjs"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-tfBgelm3d4bLkQ@jetpack",
      "strict_min_version": "139.0"
    }
  }
}