docs: clean README — drop references to non-public mirror

README.md

@@ -22,11 +22,11 @@ configs:
 
 # LexBench-Browser
 
-Public release of the LexBench-Browser benchmark for evaluating AI browser agents on real-world web tasks.
+LexBench-Browser is a benchmark for evaluating AI browser agents on real-world web tasks across 50+ Chinese and English websites — e-commerce, social, video, tools/education, finance, and more.
 
 ## Dataset Description
 
-LexBench-Browser evaluates AI agents on multi-step browsing tasks across 50+ Chinese and English websites — e-commerce, social, video, tools/education, finance, and more. This public release contains **220 tasks** that do not gate on user login, suitable for open evaluation. The full dataset (including login-gated tasks) is available in the private mirror.
+This release contains **220 tasks** spanning common multi-step browsing flows. None of the tasks gate on user login, so they can be benchmarked end-to-end without manual sign-in.
 
 ### Dataset Statistics (v3.0, 2026-04-28)
 
@@ -143,15 +143,11 @@ huggingface-cli download Lexmount/LexBench-Browser --repo-type dataset --local-d
 - **difficulty**: `easy` | `medium` | `hard`.
 - **language**: task description language (`zh` for Chinese, `en` for English).
 - **website_region**: target website region (`zh` for Chinese sites, `en` for international sites).
-- **login_required**: whether the task is login-gated. Almost all public tasks are `false`; a small number of API-style tasks are `true`.
+- **login_required**: whether the task is login-gated.
 - **robustness_tags**: ordered, deduplicated list across 6 categories / 16 tags (popup interference, sequence complexity, content dynamics, anti-crawl, localization, complex interaction).
 
 > **Migration note (v2.x → v3.0)**: the per-record `scenario_tier` field has been removed and the per-tier files (`l1.jsonl`, `l2.jsonl`, `l3-api.jsonl`, `l3-security.jsonl`, `tasks.jsonl`) have been replaced by a single `task.jsonl`. Slice the data with `login_required`, `domain`, or `risk_control` instead.
 
-## Related Resources
-
-- [Lexmount/LexBench-Browser-Private](https://huggingface.co/datasets/Lexmount/LexBench-Browser-Private) — full dataset including login-gated tasks (377 tasks).
-
 ## License
 
 Apache 2.0