Examine source code of Link Cleaner

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.0",
  "applications": {
    "gecko": {
      "id": "linkcleaner@mtalbot.addons.mozilla.org",
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "32": "icons/linkcleaner-32.png",
    "48": "icons/linkcleaner-48.png",
    "64": "icons/linkcleaner-64.png",
    "96": "icons/linkcleaner-96.png"
  },
  "default_locale": "en",
  "permissions": [
    "tabs",
    "activeTab",
    "contextMenus",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "lcbackground.js"
    ]
  }
}