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Updated iframe sandbox attributes for security.
Updated Content Security Policy to restrict script and style sources while allowing embedding. Removed previous CSP disabling and added additional security headers.
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Pull request overview
Updates the HTML preview shell and rendering proxy to tighten browser security behavior (sandbox/referrer policy and response security headers) for the Refined GitHub HTML Preview worker.
Changes:
- Adds
referrerpolicyand reorders the<iframe sandbox>flags insrc/shell.html. - Replaces “delete CSP” with an explicit CSP and adds
X-Content-Type-Options: nosniff, plus stripsSet-Cookie, insrc/main.ts.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| src/shell.html | Adjusts iframe sandboxing and referrer behavior for the embedded preview. |
| src/main.ts | Hardens response headers (CSP, cookie stripping, nosniff) for rendered content. |
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Co-authored-by: fregante <1402241+fregante@users.noreply.github.com>
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