Examine source code of Yank Tabs

{
  "name": "Yank Tabs",
  "description": "Assign a keyboard shortcut to copy current window URLs to clipboard",
  "manifest_version": 2,
  "version": "0.2",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "yank-tabs": {
      "suggested_key": {
        "default": "Ctrl+Shift+U"
      },
      "description": "Copy current window URLs to clipboard"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "clipboardWrite",
    "tabs"
  ]
}