Email tracker blocker for Superhuman
Superhuman has a built-in read-status control scoped to its own behavior. Mailshade separately provides an opt-in integration for mail.superhuman.com: Chrome's declarativeNetRequest cancels browser requests that match its reviewed tracker-pixel endpoint catalog. A local DOM scan detects pixels and supported tracking-link patterns; recognized links offer a direct-or-original choice. Detected tracker occurrences are recorded in local IndexedDB and charted per sender. This page describes that browser-side scope and the evidence used to test it.
Why Superhuman needs separate testing
Superhuman's own read-status control is scoped to its sending behavior. Incoming marketing, sales and recruiting mail can contain third-party trackers, and Superhuman's page structure differs from Gmail and Outlook.
What Mailshade does in Superhuman
- After opt-in, scopes reviewed DNR endpoint rules to mail.superhuman.com.
- Uses a dedicated Superhuman adapter for the red-eye indicator and opened-message banner.
- Detects supported tracking-link patterns locally and lets you choose direct or original.
- Records detected tracker occurrences in a per-sender IndexedDB dashboard.
Dedicated integration
Mailshade explicitly ships a Superhuman adapter. Comparative claims about other products belong to the dated benchmark, which distinguishes documented scope from behavior exercised in the tested client.
Request handling
declarativeNetRequest rules are evaluated by the browser without scripting each request and target reviewed tracker endpoints.
FAQ
How is Mailshade's Superhuman integration scoped?
Mailshade ships a dedicated adapter for mail.superhuman.com. After opt-in, its DNR rules evaluate browser requests against a reviewed tracker-pixel endpoint catalog; dated comparative results are reported by the benchmark.
Doesn't Superhuman block tracking itself?
It has a read-status setting scoped to its own surface. Mailshade separately evaluates browser requests against reviewed tracker-pixel endpoints that other senders may embed.
Does Mailshade run in the Superhuman desktop app?
Mailshade is a Chrome MV3 extension for the Superhuman web client at mail.superhuman.com. It does not run inside a desktop wrapper that lacks browser-extension support.
Will blocking trackers slow Superhuman down?
Chrome evaluates declarativeNetRequest rules rather than running an in-page script for each request. Actual responsiveness can vary by environment and requires separate measurement.
How much does the Superhuman tracker blocker cost?
Core protection remains free after a 14-day Pro trial. Paid Pro starts at $3.99 per month or $19 one-time for Founders Lifetime. Mailshade source code is published under AGPL-3.0-or-later at mailshade.org/source/.