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Dev tools · January 18, 2022

MetaMask Flask

Experiment with MetaMask's most cutting-edge features

MetaMask Flask launched on January 18, 2022 with 121 votes, #267 of 2,891 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 4 years on.

What it does

The goal of Flask is to maximize developer control, so that we can learn the full extent of what developers want to do with MetaMask, and later incorporate those lessons into the main MetaMask distribution.

Install MetaMask Flask to start building your own Snaps.

To build your own Snaps or test upcoming MetaMask features, install the MetaMask Flask browser extension on Google Chrome or Mozilla Firefox . Install Flask in a new browser profile, or disable any existing installed versions of MetaMask before installing Flask. Running multiple instances of MetaMask in the same browser profile can break dapp interactions. MetaMask Flask is an experimental tool only for developers. If you are not a developer, you should not install MetaMask Flask. We do not recommend importing your Secret Recovery Phrase from MetaMask stable to MetaMask Flask. If you import accounts with funds into Flask, you do so at your own risk. MetaMask Flask is an experimental…from docs.metamask.io

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