Examine source code of Copy Window URLs

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.6",
  "default_locale": "en",
  "description": "__MSG_extensionDescription__",
  "applications": {
    "gecko": {
      "strict_min_version": "68.0",
      "id": "{14c56cd6-87a8-47ba-ad09-c035bc2dffe0}"
    }
  },
  "icons": {
    "16": "icons/default-16.png",
    "32": "icons/default-32.png",
    "64": "icons/default-64.png",
    "128": "icons/default-128.png"
  },
  "permissions": [
    "tabs",
    "clipboardWrite",
    "notifications"
  ],
  "browser_action": {
    "default_title": "__MSG_extensionButtonLabel__",
    "browser_style": false,
    "default_icon": {
      "16": "icons/default-16.png",
      "32": "icons/default-32.png",
      "64": "icons/default-64.png",
      "128": "icons/default-128.png"
    },
    "theme_icons": [
      {
        "light": "icons/dark-16.png",
        "dark": "icons/light-16.png",
        "size": 16
      },
      {
        "light": "icons/dark-32.png",
        "dark": "icons/light-32.png",
        "size": 32
      },
      {
        "light": "icons/dark-64.png",
        "dark": "icons/light-64.png",
        "size": 64
      },
      {
        "light": "icons/dark-128.png",
        "dark": "icons/light-128.png",
        "size": 128
      }
    ]
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}