Examine source code of Extended Link Copy

{
  "manifest_version": 2,
  "name": "Extended Link Copy",
  "short_name": "ELCopy",
  "version": "0.1.4resigned1",
  "description": "This extension gets parts of the href with regex and copys them to clipboard",
  "author": "Tobias Bernrieder",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "settings.html",
    "chrome_style": true,
    "open_in_tab": false
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3ec95989-5446-448f-8fec-5e46d547e739}"
    }
  }
}