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Card 258 of 9992026-09-03 issue

Observed arrival · 2026-09-03

Extension Preflight checks a Chrome extension ZIP before submission

extensionpreflight.com Observed source
Editorial interest 84/100 Selection signal · not a rating of the site

A browser-based scanner checks Chrome extension packages for manifest, permission, remote-code, and packaging risks without uploading the ZIP.

Landing page captured for the 2026-09-03 issue.

Field notes

The scanner reads a selected Chrome extension ZIP in the browser and evaluates nine package-level rules, including manifest validity, permission patterns, remote scripts, missing files, and basic obfuscation signals. A Dark Reader 4.9.130 package serves as a live example. The page distinguishes exact manifest-based checks from weaker text-search and statistical heuristics, and explicitly excludes store-listing, privacy-policy, and runtime-functionality review.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

OpenPublic substance visible
PrettyNotable craft visible
ProPolished or operationally mature
NicheUnusually specific use

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extensionpreflight.com

Landing page observed 2026-09-03. The live site may have changed.