Examine source code of tabclip

{
  "manifest_version": 3,
  "name": "tabclip",
  "description": "Copy browser tabs to (or create them from) your clipboard.",
  "version": "1.5",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "author": "Josh Dick",
  "homepage_url": "https://joshdick.github.io/tabclip",
  "action": {
    "default_icon": "icon/128.png",
    "default_title": "tabclip",
    "default_popup": "popup.html"
  },
  "commands": {
    "copy-tabs": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "MacCtrl+Shift+C"
      },
      "description": "Copy tab(s) to the clipboard"
    },
    "paste-tabs": {
      "suggested_key": {
        "default": "Ctrl+Shift+V",
        "mac": "MacCtrl+Shift+V"
      },
      "description": "Paste tab(s) from the clipboard"
    }
  },
  "permissions": [
    "clipboardRead",
    "clipboardWrite",
    "notifications",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c9aa4e81-8153-4fcd-946e-d60c4ea4e886}"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}