Examine source code of Regex Tab Filter

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "version": "1.5.2",
  "applications": {
    "gecko": {
      "strict_min_version": "63.0a1"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "omnibox": {
    "keyword": "tf"
  },
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "tabHide",
    "menus"
  ]
}