Improve security headers based on headers.dev analysis#70
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- Migrate deprecated Feature-Policy to Permissions-Policy - Add Cross-Origin-Opener-Policy (same-origin-allow-popups) - Add Cross-Origin-Resource-Policy (same-site) - Add X-Permitted-Cross-Domain-Policies (none) - Extend error page CSP with base-uri and upgrade-insecure-requests Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
… header tests Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
Feature-Policyheader toPermissions-Policy(new syntax:feature=()instead offeature 'none')Cross-Origin-Opener-Policy: same-origin-allow-popups— prevents cross-origin window references while preserving OAuth/payment popup flowsCross-Origin-Resource-Policy: same-site— restricts resource embedding to same-site origins (allows CDN subdomains)X-Permitted-Cross-Domain-Policies: none— blocks legacy Flash/Adobe cross-domain requestsContent-Security-Policywithbase-uri 'none'andupgrade-insecure-requestsIdentified via https://headers.dev/analyze?url=www.previousnext.com.au
Test plan
nginx -t)Permissions-Policyheader is present andFeature-Policyis goneCross-Origin-Opener-Policy,Cross-Origin-Resource-Policy, andX-Permitted-Cross-Domain-Policiesheaders are present🤖 Generated with Claude Code