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Chrome and Firefox extensions (MV3) v1.0.0

Use this resource to build a browser extension on Manifest V3

New

  • 523 downloads
  • 106 likes
  • 237 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install browser-extension-manifest-v3-2

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent writes extensions for Chrome, Firefox, Safari and Edge on Manifest V3: service workers, content scripts, background processing and messaging between components. It applies extension security best practices and helps migrate from Manifest V2.

Mostly picked by

Updated November 2, 2026

Card for the “Chrome and Firefox extensions (MV3)” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: Manifest V3 architecture and service workers
  • SKILL.md: content scripts, messaging and WebExtension APIs
  • SKILL.md: security best practices and store publishing

Good fit for

  • You are building an extension that changes pages on a website
  • You must migrate a Manifest V2 extension to V3

Not for

    Tags

    • extension
    • manifest v3
    • chrome
    • firefox

    About

    You say

    “Build a Manifest V3 Chrome extension that highlights prices on product pages.”

    Card for the “Chrome and Firefox extensions (MV3)” skill

    Skill published by travisjneuman under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to build a browser extension on Manifest V3
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md3.1 KB

    Origin and licence

    Listed unmodified

    Author
    travisjneuman
    Source
    github.com/travisjneuman/.claude/tree/80adced2f6fc0cb54fadb0fd6f0d7429d1f84bd7/skills/agent-browser-extension-developer
    Licence
    MIT

    Notice

    « agent-browser-extension-developer » (travisjneuman, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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