# MetaMask Flask

> The frontier of Ethereum wallets, in your browser

Canonical page: [https://chrome-stats.com/d/metamask-flask](https://chrome-stats.com/d/metamask-flask)

## Overview

- **ID:** `metamask-flask`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** MetaMask Labs
- **Category:** privacy-security,social-communication
- **Daily users:** 52
- **Weekly downloads:** 2
- **Rating:** 4.60 / 5 (10 ratings)
- **Version:** 13.45.1.150
- **Last updated:** 2026-09-02
- **First published:** 2021-11-17
- **Size:** 19 MB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/metamask-flask/)
- **Website:** [https://support.metamask.io](https://support.metamask.io/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/metamask-flask/privacy/](https://addons.mozilla.org/firefox/addon/metamask-flask/privacy/)

## Description

MetaMask Flask is the developer-focused canary distribution of the MetaMask browser extension. It exposes experimental and unstable APIs so developers can prototype, test, and debug advanced dApp integrations and new wallet features before changes reach the production release. Flask is built to maximize developer control and surface what teams need from a programmable wallet.

Flask offers core MetaMask functionality — buy, sell, swap, and earn — plus broad multi-chain and token support (Ethereum, Polygon, BSC, Arbitrum, Solana, Bitcoin, and more). It retains MetaMask’s industry-leading security and privacy controls, including transaction previews, live threat surveillance, MEV protection, and configurable privacy settings. Intended for developers and testing only; source code, privacy policy, and production MetaMask links are available for review.

## Rankings

- #15,771 — Overall
- #3 — metamask
- #52 — ethereum
- #212 — bitcoin
- #217 — nft

## Permissions and access

### Permissions

- `storage`
- `unlimitedStorage`
- `clipboardWrite`
- `http://*/*`
- `https://*/*`
- `ws://*/*`
- `wss://*/*`
- `activeTab`
- `webRequest`
- `webRequestBlocking`
- `*://*.eth/`
- `notifications`
- `identity`
- `cookies`

### Content script matches

- `*`
- `connect.trezor.io`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [MetaMask](https://chrome-stats.com/d/metamask-eth) — 3.00 / 5
- [MetaMask](https://chrome-stats.com/d/metamaskio-ether) — 5.00 / 5
- [Metarnask WaIIet](https://chrome-stats.com/d/metacrypto_wallet) — 8 users, 1.00 / 5
- [MetaMask](https://chrome-stats.com/d/official-metamask) — 14 users, 4.99 / 5
- [MetaMask Wallet](https://chrome-stats.com/d/io-metamask-wallet) — 1 users, 5.00 / 5
- [MetaMask Wallet](https://chrome-stats.com/d/metamask-for-wallet) — 19 users, 4.98 / 5
- [MetaMask](https://chrome-stats.com/d/plus-calculator) — 35 users, 1.41 / 5
- [MetaMask Wallet](https://chrome-stats.com/d/noone-mlb-live) — 26 users, 5.00 / 5
- [MetaMask Wallet](https://chrome-stats.com/d/meta-add-on-eth) — 4 users, 5.00 / 5
- [Extension](https://chrome-stats.com/d/metamaskkkkext) — 4 users, 5.00 / 5
- [Extension](https://chrome-stats.com/d/metamask9nf3298g38y) — 7 users, 1.01 / 5
- [MetaMask for Firefox](https://chrome-stats.com/d/metamask-for-firefox) — 1 users, 1.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/metamask-flask)