Privacy Policy
Last updated: July 2026
IronCurtain collects pseudonymous usage data — including the domain names of sites you visit — to identify where the extension needs fixing. It is tied only to a random install ID, never to your identity, and never includes full URLs or page content. Sensitive categories (finance, health, adult, government) are excluded on a best-effort basis. You can opt out at any time from the extension popup.
Usage Analytics
IronCurtain collects the following anonymous data to help understand how the extension is used and where to focus improvements:
- Random install ID — a randomly generated identifier with no connection to your identity, browser profile, or Google account
- Extension version — so we know which version is in use
- Block counts by category — aggregate counts of how many popups, overlays, ad scripts, redirects, etc. were blocked (e.g., "12 popups blocked today"). No URLs, site names, or page content are included
- Extension interaction counts — aggregate counts of basic interactions, such as how often you open the extension popup. No URLs or page content
- Whitelist count — the number of sites you've whitelisted (not the site names themselves)
- Visited site domains — hostnames (domain names only) of sites you visit, with per-site visit counts, tied to your random install ID
- Blocked site + ad-frame domains — for each block, the top-level site domain and the ad/frame domain blocked, with counts, tied to your random install ID
This data is sent once per day as an anonymous usage summary. It contains no personally identifiable information and cannot be used to identify you.
Opting Out
You can disable analytics at any time using the toggle at the bottom of the IronCurtain popup. When disabled, no data is collected or transmitted. The extension continues to function normally.
Issue Reports
If you choose to submit an issue report via the popup, the following is sent:
- The full URL of the current page where the issue occurred, so we can reproduce it
- The recent block log for that tab (block reasons only, no page content)
- Your pseudonymous install ID and extension version
Issue reports are voluntary and user-initiated. Nothing is sent unless you click "Report issue" in the popup.
What We Do NOT Collect
IronCurtain does not collect:
- Full page URLs, query strings, or page content in automatic telemetry — domain names only (a voluntary issue report includes the reported page's URL)
- Page content, cookies, or form data
- Personally identifiable information
- Data used for cross-site tracking or fingerprinting
We do not use IP addresses for tracking, identification, or analytics purposes. Note that our hosting provider may temporarily process IP addresses in standard server logs for security and operational purposes.
Network Requests
IronCurtain makes two types of outbound requests:
- Anonymous usage summaries — sent once per day (unless disabled)
- Issue reports — only when you manually submit a report
Ad blocking itself uses Chrome's built-in declarativeNetRequest API and does not require external requests.
Local Storage
The extension uses Chrome's storage APIs to store:
- Enabled/disabled state (boolean)
- Whitelisted sites (hostnames you manually add)
- Analytics opt-out preference (boolean)
- Random install ID (generated once and stored locally)
- Daily block counters (reset after each summary is sent)
Permissions
The extension requests the following permissions:
- activeTab — to access the current tab for the popup display and whitelist functionality
- scripting — to inject logic that detects and removes intrusive overlays
- storage — to save preferences and anonymous counters
- tabs — to track block counts per tab and update the badge
- alarms — to schedule the daily usage summary
- declarativeNetRequest — to block requests to known ad and popup domains
- host_permissions: <all_urls> — required to detect and remove intrusive overlays, popups, and scripts across websites. All processing occurs locally, and no page content is collected or transmitted
Third-Party Services
The IronCurtain browser extension sends telemetry and issue reports only to IronCurtain's own servers and uses no third-party analytics. This website (ironcurtain.io) uses Google Analytics 4 to measure visitor traffic — pages viewed, approximate region, device and browser type. Google Analytics sets cookies and processes this usage data under Google's privacy policy; you can opt out with Google's opt-out browser add-on. This applies to the website only, not the extension.
Changes to This Policy
If this policy changes, the updated version will be published here with a revised date. Material changes will be noted in the extension's changelog.
Contact
For questions about this privacy policy, contact: ironcurtainapp@gmail.com