Cols Atlas — Privacy Policy

Chrome Extension · Last updated: 19 April 2026

1. Who we are

Cols Atlas (the "Extension") is a free Chrome browser extension that overlays cycling mountain passes on Strava route maps. It is developed and maintained independently and is not affiliated with, endorsed by, or sponsored by Strava, Inc.

2. What data the Extension processes

Data stored locally on your device

The Extension stores the following data in your browser's local storage only:

• A flag indicating whether you have seen the first-run onboarding tour (colsAtlasOnboardingSeen)
• Your preference for whether the side panel is collapsed or expanded (colsAtlasPanelCollapsed)

This data never leaves your device. It is stored through Chrome's standard chrome.storage.local and localStorage APIs and is automatically removed when you uninstall the Extension.

Data the Extension does NOT collect

• No personal information (name, email, address, phone)
• No Strava account data, routes, or activities
• No location data or GPS coordinates from your device
• No browsing history
• No usage analytics or telemetry
• No cookies set by the Extension
• No unique identifiers or fingerprints

3. Network activity

The Extension makes network requests only in the following cases:

• Loading its own bundled dataset: When you open a Strava route page, the Extension loads a data file (cols-database.json) that ships with the Extension itself. This is not an external request.
• Loading climb profile images: When you click "Show climb profile" in a popup, the Extension loads a profile image hosted on cyclingcols.b-cdn.net. Your IP address is visible to that CDN as part of standard HTTP requests, which is unavoidable for any image load.
• Opening external links: When you click "View full details on CyclingCols →" or the bug-report email link, a new tab opens in your browser. The Extension does not track these clicks.

The Extension does not send any data to the Extension developer or to any analytics service.

4. Permissions requested

• storage — used to save your onboarding and panel-collapsed preferences locally.
• activeTab — used by the toolbar popup to check whether the current tab is a Strava route page. Checked only when you click the Extension icon.
• host permissions for strava.com — required so the content script can inject the cols overlay into the Strava route map. The Extension does not run on any other website.

5. Third-party services

The Extension interacts with Strava's public web pages only to inject a visual overlay. It does not authenticate with Strava, does not read your Strava account, and does not modify your activities or routes.

Climb profile images are loaded on demand from CyclingCols.com. When you click to view a profile, your browser makes a standard image request. CyclingCols' own privacy policy applies to those requests.

6. Children's privacy

The Extension is not directed at children under 13 and does not knowingly process data from children.

7. Changes to this policy

If this policy is updated, the "Last updated" date at the top of the page will change. For substantive changes, a notice will be added to the Extension's Chrome Web Store listing and GitHub repository.

8. Contact

Questions, concerns, or bug reports: support@colsatlas.ch