Cookie Policy

Effective date: 4 March 2026 · Last updated: 4 March 2026

This Cookie Policy explains how CarbonFirefly Ltd ("we", "us", "our") uses cookies and similar technologies on the CarbonFirefly website at www.carbonfirefly.ai.

    We respect your right to privacy. Non-essential cookies are only placed with your explicit
    consent. You can change your preferences at any time.
  

1. What Are Cookies?

Cookies are small text files that are placed on your device when you visit a website. They are widely used to make websites work efficiently and to provide information to the site owners.

We also use similar technologies such as localStorage (browser-based storage) for some functionality. References to "cookies" in this policy include these similar technologies.

2. Cookies We Use

We categorise cookies into the following types:

Strictly Necessary Cookies

These cookies are essential for the Service to function. They cannot be switched off. They are usually set in response to actions you take, such as signing in or setting your privacy preferences.

Name	Purpose	Type	Duration
`cf_access_token`	Authentication — keeps you signed in	localStorage	30 minutes
`cf_refresh_token`	Authentication — refreshes your session	localStorage	30 days
`cf_cookie_consent`	Records your cookie consent preference	localStorage	Persistent
`cf_user_data`	Stores your local calculation history	localStorage	Persistent
`cf_anon_queries`	Stores anonymous calculation history (not signed in)	localStorage	Persistent

Analytics Cookies

These cookies help us understand how visitors interact with the Service. They are only set if you consent to analytics via our cookie banner. All analytics data is collected by PostHog and is used solely to improve the Service.

Name	Purpose	Provider	Duration
`ph_*`	Analytics — page views, feature usage, session data	PostHog	1 year
`distinct_id`	Anonymous visitor identifier for analytics	PostHog	1 year

Third-Party Cookies

If you sign in using Google OAuth, Google may set cookies as part of the authentication process. These are governed by Google's Privacy Policy.

3. How to Manage Cookies

Cookie Consent Banner

When you first visit the Service, a cookie consent banner will appear. You can choose to:

Accept — all cookies (including analytics) will be placed
Decline — only strictly necessary cookies will be placed

You can change your preference at any time by clearing your browser's local storage for this site, which will cause the consent banner to appear again on your next visit.

Browser Settings

Most browsers allow you to control cookies through their settings. You can typically:

View what cookies are set
Delete individual cookies or all cookies
Block cookies from specific or all sites
Block third-party cookies

Please note that blocking strictly necessary cookies may prevent the Service from functioning correctly.

4. Browser Extension Storage

The CarbonFirefly browser extension uses browser storage APIs (chrome.storage.local) to store extension settings and cached carbon data locally on your device. This data:

Is stored only on your device
Is not shared with third parties
Can be deleted by uninstalling the extension or clearing extension data in your browser settings

5. Updates to This Policy

We may update this Cookie Policy from time to time to reflect changes in technology, legislation, or our practices. The "Last updated" date at the top of this page indicates when the policy was last revised.

6. Contact Us

If you have any questions about our use of cookies, please contact us at:
privacy@carbonfirefly.ai

7. More Information

For more information about how we handle your personal data, please see our Privacy Policy.

You have the right to lodge a complaint with the Information Commissioner's Office (ICO) if you have concerns about how we use cookies or your personal data:
ico.org.uk · Wycliffe House, Water Lane, Wilmslow, Cheshire, SK9 5AF

CarbonFirefly Ltd · Company No. 16987128
Registered in England and Wales
11 Wykeham Terrace, Brighton, BN1 3FF, United Kingdom