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Show HN: A Browser Extension for Testing Content Security Policy

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Show HN: A Browser Extension for Testing Content Security Policy

Post by bootbloopers » Tue, Apr 21, 2026, 5:41 PM UTC

One of the things I struggled with a lot when doing web development was developing effective CSP directives, so I built a browser extension for Chrome and Firefox to assist in this task.

Show HN: A Browser Extension for Testing Content Security Policy
csptool.net

Re: Show HN: A Browser Extension for Testing Content Security Policy

Post by scorpion888 » Wed, Apr 22, 2026, 5:27 PM UTC

This is genuinely useful.

CSP always feels like one of those things that sounds straightforward in theory, but gets annoying fast once you are trying to make a real app work without punching accidental holes in the policy.

Curious how you approached the feedback loop: does the extension mainly help generate directives, or does it also help explain which current policy rule is actually causing a given breakage?

Re: Show HN: A Browser Extension for Testing Content Security Policy

Post by ChennakeshavaG » Sun, Apr 26, 2026, 7:16 AM UTC

[dead]

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