Last updated: 2026-08-01

This extension (“the add-on”) is designed to be privacy-first. This page explains what data it stores, where it lives, and when anything leaves your browser.

Data stored locally

The add-on stores the following data in your browser’s IndexedDB (database olx-ban-db), on your own device:

  • Listings you have marked (banned/unbanned) — listing IDs and the site name
  • Your 1-3 star ratings for sellers
  • Your private comments on listings (max 50 characters)
  • Viewed-item history (listing IDs and timestamps)
  • Configuration: banned-ad style, collapse delay, housekeeping days

None of this data is sent to the developer, to Mozilla, or to any third party by default. The add-on makes no network requests unless you enable sync.

Optional GitHub Gist sync

The only network feature is user-initiated sync:

  • You must explicitly enter your own GitHub Personal Access Token (with gist scope only) in the options page
  • On your command (or the configured interval), the add-on sends your data to your own GitHub Gist, owned by your GitHub account
  • The token is stored only in your browser’s local storage and is used exclusively to access your own Gist
  • You can remove the token at any time; sync stops immediately
  • Deleting the Gist deletes all synced copies — the add-on does not retain a server-side copy anywhere

The add-on owner has no access to your Gist, your token, or your data.

Data retention and deletion

  • Data stays in your browser until you remove the add-on, clear site data, or until automatic housekeeping removes entries older than the configured days (default 360)
  • Uninstalling the add-on deletes its IndexedDB from your browser
  • To delete synced data, delete the Gist from your GitHub account

Data collection permissions declaration

In the add-on manifest, browser_specific_settings.gecko.data_collection_permissions.required is declared as “none” — the add-on does not collect or transmit user data to Mozilla or any other party.

Permissions used

  • activeTab + scripting + host permissions for olx.pl, otomoto.pl, api.github.com — used solely to render the in-page controls and to communicate with GitHub only when sync is enabled

Website terms

The add-on is an unofficial, user-side tool. It does not scrape websites, bypass authentication, or modify the sites’ servers. It only reads and displays content in your own browser session. Usage must respect the terms of service of OLX.pl and Otomoto.pl.

Contact

Questions or removal requests: piotereks@duck.com.

I may update this page when the add-on’s functionality changes.