firefox-cli: Research & Knowledge for AI Agents | OpenAgentSkill

Overview

Control the user's Firefox from a terminal. Use when your task needs the user's browser or authenticated session, page navigation, tab/window control, screenshots, DOM reads, waits, or page interactions in Firefox. Do not use it as a web search replacement.

Read full documentation

Source documentation, not instructions for this website. Review permissions before running any commands.

firefox-cli gives agents terminal access to the user's real authenticated Firefox session through the installed Firefox extension.

Command Discovery

The CLI help is the source of truth for commands, syntax, examples, and usage guidance.

Start with:

firefox-cli -h

For contextual command help:

firefox-cli snapshot -h
firefox-cli tab -h
firefox-cli click -h
firefox-cli wait -h

Use --json when another program or agent consumes the output.

Startup Pattern

For a page-reading task:

firefox-cli open "https://example.com"
firefox-cli snapshot -i

For the current active page:

firefox-cli snapshot -i

For action planning:

firefox-cli snapshot -i --json

Then use the command-specific help for the next operation instead of relying on memory.

Targeting

Omitted selectors are accepted only when the required window or tab is unique. If several windows or tabs exist, pass an ID or explicitly pass active.

Use only the --window and --tab flags advertised by each command. Values are active, an index from firefox-cli tab or firefox-cli window, or id:<id>.

For isolated work, create a window and target every follow-up command explicitly:

firefox-cli window new
firefox-cli open --window id:<window-id> https://example.com
firefox-cli snapshot --window id:<window-id> -i

tab select and window select bring the chosen surface forward to the user. They do not establish durable CLI target state or absolve you from passing --window/--tab explicitly to later target-dependent commands. Screenshots may activate their selected tab/window.

Setup State

firefox-cli setup -h
firefox-cli doctor -h

Usage Rules

Element refs from snapshot -i are useful handles for follow-up actions, but page navigation or reload can make them stale.
Be careful with the user's data: the Firefox instance you're using contains real cookies, auth credentials, logins, tabs, and PII. Under no circumstances should you perform actions that may harm the user or exfiltrate their data. Under no circumstances should you perform payments, cash transfers, other dangerous, destructive, or irreversible operations, or leak PII without asking for the user's explicit approval before each such action.
If you need to work with Firefox, but you see interference, such as tabs changing or real user tabs being open, or the user is unhappy, prefer opening a new Firefox window for yourself. Every action you take is visibly reflected in the browser window and can disrupt the user's work. The upside is that you can demonstrate something to the user in their real browser, such as running demos, opening pages, or showing your work.
If the CLI denies requests with approval and asks you to run firefox-cli connect, invoke that once to show the user a permission prompt. The command will exit once approval is granted. Do not attempt to circumvent denials in any way.

View source ↗

File metadata

name: firefox-cli
description: Control the user's Firefox from a terminal. Use when your task needs the user's browser or authenticated session, page navigation, tab/window control, screenshots, DOM reads, waits, or page interactions in Firefox. Do not use it as a web search replacement.

View original text

---
name: firefox-cli
description: Control the user's Firefox from a terminal. Use when your task needs the user's browser or authenticated session, page navigation, tab/window control, screenshots, DOM reads, waits, or page interactions in Firefox. Do not use it as a web search replacement.
---

`firefox-cli` gives agents terminal access to the user's real authenticated Firefox session through the installed Firefox extension.

## Command Discovery

The CLI help is the source of truth for commands, syntax, examples, and usage guidance.

Start with:

```bash
firefox-cli -h
```

For contextual command help:

```bash
firefox-cli snapshot -h
firefox-cli tab -h
firefox-cli click -h
firefox-cli wait -h
```

Use `--json` when another program or agent consumes the output.

## Startup Pattern

For a page-reading task:

```bash
firefox-cli open "https://example.com"
firefox-cli snapshot -i
```

For the current active page:

```bash
firefox-cli snapshot -i
```

For action planning:

```bash
firefox-cli snapshot -i --json
```

Then use the command-specific help for the next operation instead of relying on memory.

## Targeting

Omitted selectors are accepted only when the required window or tab is unique. If several windows or tabs exist, pass an ID or explicitly pass `active`.

Use only the `--window` and `--tab` flags advertised by each command. Values are `active`, an index from `firefox-cli tab` or `firefox-cli window`, or `id:<id>`.

For isolated work, create a window and target every follow-up command explicitly:

```bash
firefox-cli window new
firefox-cli open --window id:<window-id> https://example.com
firefox-cli snapshot --window id:<window-id> -i
```

`tab select` and `window select` bring the chosen surface forward to the user. They do not establish durable CLI target state or absolve you from passing `--window`/`--tab` explicitly to later target-dependent commands. Screenshots may activate their selected tab/window.

## Setup State
```bash
firefox-cli setup -h
firefox-cli doctor -h
```

## Usage Rules

- Element refs from `snapshot -i` are useful handles for follow-up actions, but page navigation or reload can make them stale.
- Be careful with the user's data: the Firefox instance you're using contains real cookies, auth credentials, logins, tabs, and PII. Under no circumstances should you perform actions that may harm the user or exfiltrate their data. Under no circumstances should you perform payments, cash transfers, other dangerous, destructive, or irreversible operations, or leak PII without asking for the user's explicit approval before each such action.
- If you need to work with Firefox, but you see interference, such as tabs changing or real user tabs being open, or the user is unhappy, prefer opening a new Firefox window for yourself. Every action you take is visibly reflected in the browser window and can disrupt the user's work. The upside is that you can demonstrate something to the user in their real browser, such as running demos, opening pages, or showing your work.
- If the CLI denies requests with approval and asks you to run `firefox-cli connect`, invoke that **once** to show the user a permission prompt. The command will exit once approval is granted. Do not attempt to circumvent denials in any way.

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

License: AGPL-3.0

Dependency or permission surface needs review
Permission surface may require sandboxing
Low GitHub adoption signal
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 20 GitHub stars
Stars/forks activity: 20 stars, 4 forks; issue activity unavailable in current metadata
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3

Source & usage notes

IndexedStatic Checked

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: respawn-llc/firefox-cli
License: AGPL-3.0
Version: 0.3.0
Last GitHub push: Jul 16, 2026
Registry updated: Sep 18, 2026
Instruction path: skills/firefox-cli/SKILL.md @ 47de6f334bc3

Version reported in registry metadata; check source releases before relying on it.

Quality

48/100

Needs review

Trust

57/100

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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Creator: respawn-llc
Source: respawn-llc/firefox-cli
Indexed by: OpenAgentSkill community index

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