Examine source code of Copy as Markdown Link

{
  "manifest_version": 3,
  "name": "Copy as Markdown Link",
  "version": "1.5",
  "description": "Copies the current tab's URL and title as a Markdown/Jira/HTML link to the clipboard.",
  "author": "JayBeeDe",
  "browser_specific_settings": {
    "gecko": {
      "id": "@copy-as-markdown-link",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Copy as Markdown Link"
  },
  "commands": {
    "copy-markdown-link": {
      "suggested_key": {
        "default": "Ctrl+Alt+M",
        "windows": "Ctrl+Alt+M",
        "mac": "Command+Alt+M",
        "linux": "Ctrl+Alt+M"
      },
      "description": "Copy the current tab's URL and title as Markdown link."
    },
    "copy-jira-link": {
      "suggested_key": {
        "default": "Ctrl+Alt+J",
        "windows": "Ctrl+Alt+J",
        "mac": "Command+Alt+J",
        "linux": "Ctrl+Alt+J"
      },
      "description": "Copy the current tab's URL and title as Jira link."
    },
    "copy-html-link": {
      "suggested_key": {
        "default": "Ctrl+Alt+H",
        "windows": "Ctrl+Alt+H",
        "mac": "Command+Alt+H",
        "linux": "Ctrl+Alt+H"
      },
      "description": "Copy the current tab's URL and title as HTML link."
    }
  },
  "icons": {
    "512": "icons/icon.png"
  }
}