Copy Host

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Copy Host",
  "short_name": "copyhost",
  "description": "This extension allows you to copy hostname of the current tab to your clipboard.",
  "version": "1.0",
  "browser_action": {
    "default_icon": "img/icon16.png",
    "default_title": "Press the button to copy the hostname to the clipboard",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "permissions": [
    "activeTab",
    {
      "fileSystem": [
        "write",
        "retainEntries",
        "directory"
      ]
    }
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+C"
      }
    }
  }
}