Is Extension safe and trustworthy?

tashan scores Extension on public evidence — tashan score 45.0/100, it is currently active. Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install Extension?

Configure it from its source repository — it is a remote / registry server.

‹ The Index

Extension

plugin

MCP tools for browser extension development: scaffold from 50+ templates, run the dev server with HMR, inspect the live DOM and logs, and publish store-ready builds for Chrome, Edge, and Firefox.

Works with: Claude Code (native)
native: this artifact type is that client's own format

Category: Dev Tools & CI — see all ranked ›

Install (Claude Code):

/plugin marketplace add extensiondev/mcp
/plugin install extension-mcp@extensiondev-mcp

tashan score: 45.0
Adoption: 1 repos
Freshness: 100.0
Evidence coverage: 59% of the inputs this score can use — the rest are unknown, and the score is discounted for it
Health: active
GitHub stars: 1
License: Apache-2.0

Security audit

Not scanned yet. We audit npm-published capabilities for known advisories, install-time scripts and permission surface; this one has no npm package we can resolve, or has not reached the queue.

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

Extension scores 45 today. Pro keeps the series, so you can see whether that is a project getting better or one on its way down.

Every score since we started measuring, for any capability
The named replacement when something you run is dying — not just that it is
tashan doctor over the config you already have, on your machine

Start a 7-day trial › Everything measured on this page stays free.

Show your score

Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/plugin-extensiondev-mcp-extension-mcp.svg)](https://tashan.sh/capability/plugin-extensiondev-mcp-extension-mcp.html)

source ↗ · plugin:extensiondev/mcp/extension-mcp

Everything on this page is public evidence and free. What it cannot know is whether you run this — check your whole config, free, in the browser. tashan Pro adds the series behind each row and names a replacement for anything dying.

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-08-22 · scorer s5 · how · something wrong here?