Examine source code of ClearPrivateData

{
  "manifest_version": 2,
  "default_locale": "en",
  "description": "__MSG_cpd_ShortDesc__",
  "name": "__MSG_cpd_Name__",
  "version": "1.5.5resigned1",
  "icons": {
    "96": "icons/cpd_Icon.png"
  },
  "developer": {
    "name": "Ademes"
  },
  "applications": {
    "gecko": {
      "id": "de@ClearPrivateData",
      "strict_min_version": "52.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/cpd_Button.png",
      "48": "icons/cpd_Button.png"
    },
    "default_title": "__MSG_cpd_Title__"
  },
  "options_ui": {
    "page": "settings/cpd_Settings.html",
    "open_in_tab": true
  },
  "permissions": [
    "browsingData",
    "storage",
    "notifications",
    "contextMenus",
    "tabs"
  ]
}