MCP server that lets AI agents build, run, inspect, and publish browser extensions. 30 tools for scaffolding, live DOM inspection, log streaming, and store-ready builds across Chrome, Edge, Firefox, Safari, and every Chromium- or Gecko-based browser.
- capability exposure inferred + 35
- trust mitigators mixed − 3
inferred mixed
The A–E grade is our heuristic synthesis — a "review this" prompt, not a verdict. Each factor is tagged by what backs it: attested (a verifiable record), reported (a third party's claim), or inferred (our own heuristic, e.g. permissions). See methodology.
graded 10m ago · see ecosystem CVEs →
- B · 19 → B · 32
No known CVEs for this server.
- low dangerous code
env-secret-flows-to-network-js: A process environment value (often a secret/token) flows into a network call — possible credential exfiltration. (extensiondev-mcp-007ca2a/src/tools
analyzed commit 007ca2a · analyzer v27 · 1w ago
skills & prompt files 1
- agent-rules extensiondev-mcp-007ca2a/claude/CLAUDE.md
[](https://mcpobservatory.com/servers/github:extensiondev/mcp/security) Heuristic, inferred signals — false positives (legitimately powerful tools, forks, language ports) are expected. Treat each as "review this", not a verdict. See the ecosystem-wide picture on the security hub, or the fleet security of extensiondev.