Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add lisihao/Solar --skill fast-browser-usegit clone --depth 1 https://github.com/lisihao/SolarWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/lisihao/solar/fast-browser-use)<a href="https://agentmods.dev/skills/lisihao/solar/fast-browser-use"><img src="https://agentmods.dev/badge/skills/lisihao/solar/fast-browser-use/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/lisihao/solar/fast-browser-use"><img src="https://agentmods.dev/badge/skills/lisihao/solar/fast-browser-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00003 | $0.01690 |
| Opus 5.5 | $0.00001 | $0.00676 |
| Sonnet 5.5 | $0.00001 | $0.00338 |
| Haiku 4.5 | $0.00000 | $0.00169 |
Grade A, and why
fast-browser-use scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
92% identical to fast-browser-use — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fastest Browser Use
A Rust-based browser automation engine that provides a lightweight binary driving Chrome directly via CDP. It is optimized for token-efficient DOM extraction, robust session management, and speed.
🧪 Recipes for Agents
1. Bypass "Bot Detection" via Human Emulation
Simulate mouse jitter and random delays to scrape protected sites.
fast-browser-use navigate --url "https://protected-site.com" \
--human-emulation \
--wait-for-selector "#content"
2. The "Deep Freeze" Snapshot
Capture the entire DOM state and computed styles for perfect reconstruction later.
fast-browser-use snapshot --include-styles --output state.json
3. Login & Cookie Heist
Log in manually once, then steal the session for headless automation.
Step 1: Open non-headless for manual login
fast-browser-use login --url "https://github.com/login" --save-session ./auth.json
Step 2: Reuse session later
fast-browser-use navigate --url "https://github.com/dashboard" --load-session ./auth.json
4. 🚜 Infinite Scroll Harvester
Extract fresh data from infinite-scroll pages — perfect for harvesting the latest posts, news, or social feeds.
# Harvest headlines from Hacker News (scrolls 3x, waits 800ms between)
fast-browser-use harvest \
--url "https://news.ycombinator.com" \
--selector ".titleline a" \
--scrolls 3 \
--delay 800 \
--output headlines.json
Real output (59 unique items in ~6 seconds):
[
"Genode OS is a tool kit for building highly secure special-purpose OS",
"Mobile carriers can get your GPS location",
"Students using \"humanizer\" programs to beat accusations of cheating with AI",
"Finland to end \"uncontrolled human experiment\" with ban on youth social media",
...
]
Works on any infinite scroll page: Reddit, Twitter, LinkedIn feeds, search results, etc.
What ships with it
60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- _meta.json 135 B
- .clawhub/origin.json 148 B
- Cargo.toml 1.8 KB
- CODEBUDDY.md 5.6 KB
- package-lock.json 686 B
- package.json 111 B
- README.md 1.4 KB
- rustfmt.toml 212 B
- src/bin/cli.rs 13 KB
- src/bin/mcp_server.rs 7.1 KB
- src/browser/config.rs 3.4 KB
- src/browser/debug.rs 355 B
- src/browser/mod.rs 1.5 KB
- src/browser/session.rs 17 KB
- src/dom/element.rs 13 KB
- src/dom/extract_dom.js 23 KB runs code
- src/dom/mod.rs 497 B
- src/dom/tree.rs 9.7 KB
- src/dom/yaml.rs 4.3 KB
- src/error.rs 3.2 KB
- src/lib.rs 446 B
- src/mcp/handler.rs 2.0 KB
- src/mcp/mod.rs 4.5 KB
- src/tools/annotate.rs 6.7 KB
- src/tools/click.rs 3.0 KB
- src/tools/close_tab.rs 1.5 KB
- src/tools/close.rs 1.1 KB
- src/tools/convert_to_markdown.js 4.2 KB runs code
- src/tools/cookies.rs 1.5 KB
- src/tools/debug.rs 1.2 KB
- src/tools/evaluate.rs 1.1 KB
- src/tools/extract.rs 2.1 KB
- src/tools/go_back.rs 1.0 KB
- src/tools/go_forward.rs 1.1 KB
- src/tools/hover.js 754 B runs code
- src/tools/hover.rs 3.6 KB
- src/tools/html_to_markdown.rs 2.8 KB
- src/tools/input.rs 3.1 KB
- src/tools/local_storage.rs 4.2 KB
- src/tools/markdown.rs 6.5 KB
- src/tools/mod.rs 9.9 KB
- src/tools/navigate.rs 1.4 KB
- src/tools/new_tab.rs 1.9 KB
- src/tools/press_key.rs 2.0 KB
- src/tools/read_links.rs 1.8 KB
- src/tools/readability_script.rs 367 B
- src/tools/Readability.min.js 49 KB runs code
- src/tools/screenshot.rs 1.4 KB
- src/tools/scroll.js 726 B runs code
- src/tools/scroll.rs 3.0 KB
- src/tools/select.js 607 B runs code
- src/tools/select.rs 4.3 KB
- src/tools/sitemap.rs 14 KB
- src/tools/snapshot.rs 10 KB
- src/tools/switch_tab.rs 2.3 KB
- src/tools/tab_list.rs 2.3 KB
- src/tools/utils.rs 3.4 KB
- src/tools/wait.rs 1.4 KB
- test_auth.json 19 B
- test_state.json 301 B
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 207 lines · 3 tokens per session scan A 061b020471e9
fast-browser-use is a skill published in the GitHub repository lisihao/Solar (3 stars, last pushed 2mo ago), licensed MIT. It adds 3 tokens to every session and 1,690 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to fast-browser-use, differing in 1 line, and is treated as a copy.
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