MetaMask Flask DEVELOPMENT BUILD

Name: MetaMask Flask DEVELOPMENT BUILD
Rating: 3.8 (10 reviews)
Author: metamask-labs

THIS IS THE CANARY DISTRIBUTION OF THE METAMASK EXTENSION, INTENDED FOR DEVELOPERS.

As of June 2026, MetaMask Flask DEVELOPMENT BUILD has 10,000 users and a 3.80/5 rating from 10 reviews in the Workflow & Planning category.

metamask-labs Workflow & Planning

Chrome Web Store ↗.crx

Users+66.7%

10.0K

10,000

Rating0%

3.80

10 reviews

Reviews0%

Version

13.34.1-flask.0

Manifest V3

90-day change · In the last 90 days this extension gained 4.0K users, 8 version updates, changed permissions.

History

8 snapshots

Tracking since Apr 17, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 17, 2026	6.0K	3.80	10	13.19.0-flask.0
Apr 28, 2026	6.0K	3.80	10	13.25.0-flask.0
May 11, 2026	6.0K	3.80	10	13.27.0-flask.0
May 19, 2026	6.0K	3.80	10	13.30.0-flask.0
May 24, 2026	6.0K	3.80	10	13.31.0-flask.0
May 28, 2026	10.0K	3.80	10	13.32.0-flask.0
Jun 2, 2026	10.0K	3.80	10	13.32.1-flask.0
Jun 12, 2026	10.0K	3.80	10	13.33.0-flask.0
Now	10.0K	3.80	10	13.34.1-flask.0

Changelog

Apr 17, 2026

permissions

activeTab, alarms, clipboardWrite, notifications, scripting, storage, unlimitedStorage, webRequest, offscreen, identity, sidePanel

activeTab, alarms, clipboardWrite, notifications, scripting, storage, unlimitedStorage, webRequest, offscreen, identity, sidePanel, cookies

Permissions & access

Permissions: activeTabalarmsclipboardWritenotificationsscriptingstorageunlimitedStoragewebRequestoffscreenidentitysidePanelcookies
Host access: http://localhost:8545/, file://*/*, http://*/*, https://*/*, ws://*/*, wss://*/*

Screenshots

MetaMask Flask DEVELOPMENT BUILD screenshot 1

About

The world's most trusted crypto wallet

MetaMask Flask is a distribution channel of the MetaMask Extension for developers, which gives them access to additional unstable APIs. 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 these lessons into the main MetaMask distribution.

You can find the main / production version of MetaMask here: https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn

Crypto made easy

– Buy, sell, swap, and earn directly in your wallet
– Choose from thousands of tokens
– Connect to dapps across multiple chains
– Try DeFi, buy meme coins, collect NFTs, explore web3 gaming, and more

Advanced industry-leading security protects you 

– Know what you’re signing before you transact
– Live threat surveillance safeguards your wallet
– Designed for privacy, control what you share
– MEV and front-running protection

Live support 24/7

– Around-the-clock support from our (human!) customer service experts

SUPPORTED NETWORKS

Ethereum, Linea, BSC, Base, Arbitrum, Solana, Bitcoin, Cosmos, Avalanche, Cardano, XRP, Polygon, BNB, Starknet, and more.

SUPPORTED TOKENS

Ether (ETH), USD Coin (USDC), Tether (USDT), Wrapped Bitcoin (wBTC), Shiba Inu (SHIB), Pepe (PEPE), Dai (DAI), Dogecoin (DOGE), Cronos (CRO), Celo (CELO), and thousands more.

Download MetaMask today.

Because MetaMask adds functionality to your traditional browser, we require permission to read and write to any webpage. You can always view our source code the way you would any Chrome extension, or on GitHub:

https://github.com/MetaMask

Our privacy policy: https://consensys.net/privacy-policy/
Terms of use: https://consensys.net/terms-of-use/