docs: document chrome_policy on on-demand browsers - #377

Bugbot Analysis Progress (1m 20s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (1m 15s)
✅ Posted analysis results (2s)

Final Result: Bugbot completed review - no new issues found. 2 previously reported issues remain unresolved.

Request ID: serverGenReqId_0465c8a8-d89c-4e2c-9520-0c005f759914