Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
Log in
Preview of CookieC

CookieC by CookieC

Checks cookies before and after consent to see if websites respect your privacy preference.

0 (0 reviews)0 (0 reviews)
1 User1 User
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
Cookie banners are supposed to respect our choice. CookieC checks whether they actually do.

Every time a site shows a consent banner, CookieC runs an audit: it looks at the cookies that fired before you answered, then the cookies present after your choice — and tells you, in plain language, whether the site respected your privacy or tracked you anyway.

What you get
• A clear verdict for the site you're on — "respects your 'no'" or "tracks you anyway."
• A before‑vs‑after breakdown of exactly which cookies fired, grouped by type (tracking vs required) with each cookie's category and the company behind it.
• An Audit Report of every site you've visited, split into those respecting and those not respecting your privacy, with a simple compliance chart.
• Detection of consent banners in 25 languages (all official EU languages plus Norwegian).
• Optional one‑click tracker blocking on sites that ignore your choice (beta).

Private by design
• Works entirely on your device. Your results stay in your browser.
• No account. No IP address. No personal data.
• Nothing is shared unless you opt in to "Be a CookieC Auditor." If you do, CookieC contributes only site names, cookie names, your banner choice, and audit activity — tied to a random, anonymous Auditor ID — to help build public Audit Records showing which websites respect our privacy and which don't. You can turn this off at any time.
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Clear recent browsing history, cookies, and related data
  • Access browser tabs

Optional permissions:

  • Access your data for all websites

Required data collection, according to the developer:

  • Website activity
  • Website content

Optional data collection, according to the developer:

  • Technical and interaction data
Learn more
More information
Add-on Links
  • Homepage
  • Support site
  • Support Email
  • Copy add-on ID
Version
1.1
Size
471.6 KB
Last updated
7 days ago (Nov 5, 2026)
Related Categories
  • Privacy & Security
License
All Rights Reserved
Privacy Policy
Read the privacy policy for this add-on
Version History
  • See all versions
Tags
  • anti tracker
  • download
  • privacy
  • reddit
  • security
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Download

  • Download Firefox
  • Windows
  • macOS
  • iOS
  • Android
  • Linux
  • All

Latest Builds

  • Nightly
  • Beta

Firefox for Business

  • Enterprise

Community

  • Connect
  • Contribute
  • Developer

Follow

  • Instagram
  • YouTube
  • TikTok
  • Bluesky
  • Podcast
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.