access-control-max-age

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cross-origin-cors-reference / preflight-cache-analyzer

Chrome DevTools panel that surfaces every CORS preflight, models the browser preflight cache, and flags redundant preflights costing you latency. Manifest V3, loaded unpacked, zero permissions.

chrome-extension caching cors web-performance devtools developer-tools browser-extension preflight manifest-v3 access-control-max-age

Updated Jul 19, 2026
JavaScript

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access-control-max-age

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cross-origin-cors-reference / preflight-cache-analyzer

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