Proxy probe report

2026-08-26T11:33:05.993Z — 8 target(s).

RuleSitesWorst
console-error-delta6/8low
rewriter-syntax3/8high
rewriter-url3/8high
render-gap2/8high
sandbox-storage-access2/8medium
upstream-block1/8low

https://old.reddit.com/

direct
direct render
proxied
proxied render
highRewritten script failed to parse rewriter-syntax

Proxied JavaScript is reaching the engine malformed — typically modern syntax (optional chaining, nullish coalescing, top-level await) surviving into a rewriter path that parses with an older grammar.

SyntaxError: Unexpected token '?'
highURL rewriting threw on a non-URL specifier rewriter-url

The rewriter called the URL constructor on something that is not an absolute URL — commonly a data:, blob: or inline `javascript,` module specifier. Guard these and pass them through untouched.

TypeError: Failed to construct 'URL': Invalid URL
mediumSandbox denies storage access sandbox-storage-access

Framed third-party code asked for storage access and was refused. reCAPTCHA, SSO and any login flow will fail until the sandbox grants allow-storage-access-by-user-activation — and may still fail because the framed origin is validated server-side.

requestStorageAccess: Refused to execute request. The document is sandboxed, and the 'allow-storage-access-by-user-activation' keyword is not set.
low2 console error pattern(s) unique to the proxied load console-error-delta

Not matched by a specific rule. Review for new failure classes worth encoding as rules.

SyntaxError: Unexpected token '?'
requestStorageAccess: Refused to execute request. The document is sandboxed, and the 'allow-storage-access-by-user-activation' keyword is not set.

https://www.reddit.com/

direct
direct render
proxied
proxied render
highRewritten script failed to parse rewriter-syntax

Proxied JavaScript is reaching the engine malformed — typically modern syntax (optional chaining, nullish coalescing, top-level await) surviving into a rewriter path that parses with an older grammar.

SyntaxError: Unexpected token '?'
highURL rewriting threw on a non-URL specifier rewriter-url

The rewriter called the URL constructor on something that is not an absolute URL — commonly a data:, blob: or inline `javascript,` module specifier. Guard these and pass them through untouched.

CAUGHT ERROR TypeError: Failed to construct 'URL': Invalid URL
TypeError: Failed to construct 'URL': Invalid URL
highProxied page rendered 13% of the direct content render-gap

The page loaded without a hard failure but is substantially emptier than a direct load.

direct: 11329 chars / 3097 elements
proxied: 1451 chars / 1362 elements
mediumSandbox denies storage access sandbox-storage-access

Framed third-party code asked for storage access and was refused. reCAPTCHA, SSO and any login flow will fail until the sandbox grants allow-storage-access-by-user-activation — and may still fail because the framed origin is validated server-side.

requestStorageAccess: Refused to execute request. The document is sandboxed, and the 'allow-storage-access-by-user-activation' keyword is not set.
low3 console error pattern(s) unique to the proxied load console-error-delta

Not matched by a specific rule. Review for new failure classes worth encoding as rules.

SyntaxError: Unexpected token '?'
requestStorageAccess: Refused to execute request. The document is sandboxed, and the 'allow-storage-access-by-user-activation' keyword is not set.
Failed to load resource: net::ERR_FAILED

https://en.wikipedia.org/wiki/Main_Page

direct
direct render
proxied
proxied render

No findings.

https://news.ycombinator.com/

direct
direct render
proxied
proxied render
low1 console error pattern(s) unique to the proxied load console-error-delta

Not matched by a specific rule. Review for new failure classes worth encoding as rules.

Failed to load resource: net::ERR_FAILED

https://www.bbc.com/news

direct
direct render
proxied
proxied render
highRewritten script failed to parse rewriter-syntax

Proxied JavaScript is reaching the engine malformed — typically modern syntax (optional chaining, nullish coalescing, top-level await) surviving into a rewriter path that parses with an older grammar.

CAUGHT ERROR SyntaxError: Failed to execute 'insertRule' on 'CSSStyleSheet': Failed to parse the rule '.eVtzmJ::after *{z-index:1000;}'.
CAUGHT ERROR SyntaxError: Unexpected end of JSON input
CAUGHT ERROR SyntaxError: Unexpected end of JSON input
CAUGHT ERROR SyntaxError: Unexpected end of JSON input
CAUGHT ERROR SyntaxError: Unexpected end of JSON input
low1 console error pattern(s) unique to the proxied load console-error-delta

Not matched by a specific rule. Review for new failure classes worth encoding as rules.

Failed to load resource: net::ERR_FAILED

https://duckduckgo.com/

direct
direct render
proxied
proxied render
highURL rewriting threw on a non-URL specifier rewriter-url

The rewriter called the URL constructor on something that is not an absolute URL — commonly a data:, blob: or inline `javascript,` module specifier. Guard these and pass them through untouched.

CAUGHT ERROR TypeError: Failed to construct 'URL': Invalid URL
CAUGHT ERROR TypeError: Failed to construct 'URL': Invalid URL
CAUGHT ERROR TypeError: Failed to construct 'URL': Invalid URL
low1 console error pattern(s) unique to the proxied load console-error-delta

Not matched by a specific rule. Review for new failure classes worth encoding as rules.

Failed to load resource: net::ERR_FAILED

https://github.com/

direct
direct render
proxied
proxied render

No findings.

https://stackoverflow.com/

direct
direct render
proxied
proxied render
highProxied page rendered 0% of the direct content render-gap

The page loaded without a hard failure but is substantially emptier than a direct load.

direct: 9679 chars / 3368 elements
proxied: 0 chars / 33 elements
low1 upstream request(s) blocked upstream-block

The target refuses this machine on a direct load too, so these blocks are not proxy-specific.

403 document https://stackoverflow.com/questions
low1 console error pattern(s) unique to the proxied load console-error-delta

Not matched by a specific rule. Review for new failure classes worth encoding as rules.

Failed to load resource: the server responded with a status of 403 (Forbidden)