> For the complete documentation index, see [llms.txt](https://extenson-mexamexk.gitbook.io/us/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://extenson-mexamexk.gitbook.io/us/metamask-r-extension-r.md).

# Metamask® Extension®

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To learn how to contribute to the **MetaMask** project itself, visit our Internal Docs. Building locally. Install Node.js version 18. If you are using nvm (recommended) running nvm use will automatically choose the right node version for you. Enable Corepack by executing the command corepack enable within the **metamask-extension** project. Corepack is ..