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browser-extensions

browser-extensions is a plugin for Claude Code from acaprino/daodan. Its manifest loads nothing; the 1 skill, 3 commands, 2 agents it bundles cost 162 tokens per session together, scanned A, original, MIT.

A set of tools and guidance for building Firefox browser extensions, which are small programs that add features to the browser. It covers WebExtension standards, browser APIs, background and page scripts, native messaging, and publishing.

In plain words
What is it for?
Use its scaffolding, linting, and publishing commands to start, check, and release Firefox extensions. It also supports looking up current MDN documentation.
Why use it?
It helps developers handle Firefox extension structure, cross-browser differences, checks, and publishing details without assembling that guidance themselves.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

not rated 9repo changed 4d ago A scan tokens not measured original MIT

Good fit Use its scaffolding, linting, and publishing commands to start, check, and release Firefox extensions. It also supports looking up current MDN documentation.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add acaprino/daodan
/plugin install browser-extensions
View source ↗ acaprino/daodan
Install

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.

Clone the repo
git clone --depth 1 https://github.com/acaprino/daodan

Made for: Claude Code.

Wrote 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.

agentmods badge for browser-extensions

README.md
[![agentmods](https://agentmods.dev/badge/plugins/acaprino/daodan/browser-extensions/github.svg)](https://agentmods.dev/plugins/acaprino/daodan/browser-extensions)
Your own site
<a href="https://agentmods.dev/plugins/acaprino/daodan/browser-extensions"><img src="https://agentmods.dev/badge/plugins/acaprino/daodan/browser-extensions/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.

agentmods 80×15 button for browser-extensions

Your own site · 80×15
<a href="https://agentmods.dev/plugins/acaprino/daodan/browser-extensions"><img src="https://agentmods.dev/badge/plugins/acaprino/daodan/browser-extensions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill, 3 commands, 2 agents cost 162 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

browser-extensions 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 4d 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.

exports/claude/plugins/browser-extensions/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "author": {
    "name": "Alfio Caprino"
  },
  "description": "Expert Firefox extension (WebExtension) developer covering Manifest V2/V3, all 51 browser.* APIs, content scripts, background scripts, native messaging, cross-browser compatibility, AMO publishing, web-ext CLI tooling, project scaffolding, and live MDN documentation lookup; includes /browser-extensions:firefox-scaffold, /browser-extensions:firefox-lint, /browser-extensions:firefox-publish commands",
  "license": "MIT",
  "name": "browser-extensions",
  "version": "2.0.3"
}
Contents

What it installs

The manifest is a name and a version. 1 skill, 3 commands, 2 agents travel with it, and installing the plugin installs all of them — 162 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

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.

  1. 4d ago Changed 8cf5cc4211e9
  2. 5d ago Changed 13c25f0c1322
  3. 8d ago Changed 979a9232f641
  4. 14d ago Changed 53a17eb05996
  5. 16d ago Changed 8984c771ccb2
  6. 1mo ago First seen · 10 lines scan A 7046b6184b39

Subscribe to this mod's changes

browser-extensions is a plugin published in the GitHub repository acaprino/daodan (9 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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