Fetch.enable was setting page.intercept_enabled to false and clearing intercept_block_patterns, which caused should_block_url() to always return false. As a result, Fetch.requestPaused events were never triggered and Playwright's page.route() handlers never executed. - Set intercept_enabled to true (was false) - Propagate URL patterns to page.intercept_block_patterns (was cleared) Fixes #49 Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>