metamask-extension

# MetaMask Browser Extension

You can find the latest version of MetaMask on [our official website](https://metamask.io/). For help using MetaMask, visit our [User Support Site](https://support.metamask.io/).

For [general questions](https://community.metamask.io/c/learn/26), [feature requests](https://community.metamask.io/c/feature-requests-ideas/13), or [developer questions](https://community.metamask.io/c/developer-questions/11), visit our [Community Forum](https://community.metamask.io/).

MetaMask supports Firefox, Google Chrome, and Chromium-based browsers. We recommend using the latest available browser version.

For up to the minute news, follow us on [X](https://x.com/MetaMask).

To learn how to develop MetaMask-compatible applications, visit our [Developer Docs](https://docs.metamask.io/).

To learn how to contribute to the MetaMask codebase, visit our [Contributor Docs](https://github.com/MetaMask/contributor-docs).

To learn how to contribute to the MetaMask Extension project itself, visit our [Extension Docs](https://github.com/MetaMask/metamask-extension/tree/main/docs).

## GitHub Codespaces quickstart

As an alternative to building on your local machine, there is a new option to get a development environment up and running in less than 5 minutes by using GitHub Codespaces. Please note that there is a [Limited Free Monthly Quota](https://docs.github.com/en/billing/managing-billing-for-github-codespaces/about-billing-for-github-codespaces), and after that GitHub will start charging you.

_Note: You are billed for both time spent running, and for storage used_

[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/MetaMask/metamask-extension?quickstart=1)

1. Start by clicking the button above
2. A new browser tab will open with a remote version of Visual Studio Code (this will take a few minutes to load)
3. A "Simple Browser" will open inside the browser with noVNC -- click Connect
   - Optional steps:
     - Click the button at the upper-right of the Simple Browser tab to open the noVNC window in its own tab
     - Open the noVNC sidebar on the left, click the gear icon, change the Scaling Mode to Remote Resizing
4. Wait about 20 extra seconds on the first launch, for the scripts to finish
5. Right-click on the noVNC desktop to launch Chrome or Firefox with MetaMask pre-installed
6. Change some code, then run `yarn start` to build in dev mode
7. After a minute or two, it will finish building, and you can see your changes in the noVNC desktop

### Tips to keep your Codespaces usage lower

- You are billed for both time spent running, and for storage used
- Codespaces pause after 30 minutes of inactivity, and auto-delete after 30 days of inactivity
- You can manage your Codespaces here: https://github.com/codespaces
  - You may want to manually pause them before the 30 minute timeout
  - If you have several idle Codespaces hanging around for several days, you can quickly run out of storage qu