firefox-browser SKILL.md skillA
firefox-browser from aiskillstore/marketplace is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aiskillstore/marketplace/firefox-browser@git:20260709.d4d61a6Pins git:20260709.d4d61a6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aiskillstore/marketplace
- Path
skills/1jehuang/firefox-browser/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260709.d4d61a6, committed Jul 9, 2026
- First version recorded
- Jan 13, 2026
- Size
- 12,727 bytes
- Repository stars
- 471
- License
- none declared
Control the user's Firefox browser with their logins and cookies intact. Use when you need to browse websites as the user, interact with authenticated pages, fill forms, click buttons, take screenshots, or get page content. (user).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Firefox Browser Agent Bridge
Control the user's actual Firefox browser session via WebSocket. This uses their real browser with existing logins and cookies - **not** a headless browser.
## Quick Start
```bash
# 0. If Firefox isn't running, start it first
nohup firefox &>/dev/null &
# 1. Check connection
browser ping
# 2. See what tabs are open
browser listTabs '{}'
# 3. Start a new session (recommended)
browser newSession '{"url": "https://example.com"}'
# 4. Read the page with interactable elements marked
browser getContent '{"format": "annotated"}'
```
## Client Usage
```bash
browser <action> '<json_params>'
```
## Actions Reference
### Session & Tab Management
| Action | Description | Key Params |
|--------|-------------|------------|
| `listTabs` | List all open tabs across windows | - |
| `newSession` | Create new tab to work in | `url` (optional) |
| `newWindow` | Create a new normal window to work in | `url` (optional), `focus` (defaults true), `sandbox` (private window) |
| `setActiveTab` | Switch which tab agent works on | `tabId`, `focus` |
| `getActiveTab` | Get current tab info | - |
### Navigation & Page Info
| Action | Description | Key Params |
…Read the whole file at its exact version.
How to install
mdr add aiskillstore/marketplace/firefox-browser@sha256:175d8bf1ff44a424The line at the top of this page pins the label git:20260709.d4d61a6, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ttckf2c6xnjbffzq)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 13, 2026 and Jul 9, 2026, about one every 89 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260709.d4d61a6 latest | 2026-07-09 | d4d61a6 | 12,727 B | A | view · diff |
| git:20260705.e9e4712 | 2026-07-05 | e9e4712 | 12,458 B | A | view · diff |
| git:20260113.222b7de | 2026-01-13 | 222b7de | 8,029 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12727 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
aiskillstore/marketplace · 471 stars · license none declared · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ttckf2c6xnjbffzq GET https://markdownregistry.com/api/v1/resolve?ref=aiskillstore/marketplace/firefox-browser GET https://markdownregistry.com/api/v1/blob/175d8bf1ff44a4249b65e6f5c1bde9560b154815efdedd582d90d9f2a3e63ee3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.