ChainGuard by sunken.dev

Inspect the real TLS certificate chain of every site against your regex patterns; flag matches on the toolbar icon.

About this extension

ChainGuard is a Chrome extension that passively reads the certificate of each
site you visit, checks it against regex patterns you define, and flags matches
on the toolbar icon, plus optional desktop notifications and a searchable
history of everything it scanned. Everything runs locally.

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ChainGuard by sunken.dev

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