Dynamic import() of extension modules from a content script makes Chrome log 'Unsafe attempt to load URL chrome-extension://...' on YouTube pages, which fills the extension's error list even though the modules load (HTTP 200). The content script is now one classic file built by 'npm run build'; web_accessible_resources is no longer needed and is removed. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>