Examine source code of CopyLink Pro

{
  "manifest_version": 2,
  "name": "Copy URL Shortcut",
  "version": "2.0.3",
  "description": "Instantly copy the current tab URL using Cmd+Shift+C / Ctrl+Shift+C. No more DevTools by accident.",
  "author": "MediaSmart - rphlr",
  "homepage_url": "https://github.com/rphlr/url-copier",
  "permissions": [
    "tabs",
    "clipboardWrite",
    "contextMenus",
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "styles.css"
  ],
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon.png"
    },
    "default_title": "Copy URL Shortcut",
    "default_popup": "options.html"
  },
  "background": {
    "scripts": [
      "lang/en.js",
      "lang/fr.js",
      "lang/loader.js",
      "background.js"
    ],
    "persistent": true
  },
  "commands": {
    "copy-url": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "Command+Shift+C"
      },
      "description": "Copy current tab URL"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lang/en.js",
        "lang/fr.js",
        "lang/loader.js",
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{80f6faf2-9075-4c71-84ff-2803a5425e27}"
    }
  }
}