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Chrome extension privacy
The Runearc Domain Check extension grades a domain's email setup from public DNS. It has no account, no analytics and no server of ours in the loop. Effective 10 November 2026.
Contents (5)
What it reads
When you click the extension's icon, it reads the address of the tab you are on, once, to take its domain name (for example github.com from app.github.com). It does this only after your click, never in the background, and it does not read the page's content. You can also type a domain, URL or email address; only the domain part is used.
Where lookups go
To grade the domain, the extension asks public DNS over HTTPS resolvers for the domain's public MX and TXT records (MX, SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT). It sends only DNS names, such as _dmarc.example.com. The lookups go to Cloudflare's resolver (cloudflare-dns.com) and, if that fails, Google Public DNS (dns.google), under their own privacy policies. Nothing is sent to Runearc.
If you click "Full report" or "Try Runearc", a runearc.com page opens in a new tab; that visit is covered by our privacy policy.
What it stores
- Your last six checked domains and their grade, in the browser's local extension storage, so you can check them again in one click.
- Each check's result for five minutes, in session storage that the browser clears when it closes.
Both stay on your device. Removing the extension deletes them.
What it never does
- No analytics, trackers, ads or fingerprinting.
- No browsing history: it never reads tabs you did not click it on.
- No selling or sharing of data, and no use of data for anything other than the domain check.
The extension's use of information follows the Chrome Web Store User Data Policy, including the Limited Use requirements.
Contact
Questions: privacy@runearc.com.