MetaMask

Ethereum Browser Extension

MetaMask: The Essential Ethereum Browser Extension

MetaMask is an innovative Firefox add-on serving as a fully functioning Ethereum wallet in your browser. This extension plays a crucial role in accessing Ethereum enabled distributed applications, or 'Dapps'. It injects the Ethereum web3 API into every website's javascript context to allow dApps to retrieve information from blockchain. It also allows users to create and manage their own Ethereum identities, facilitate transactions and interact securely with dApps.
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Add-on stats

By: danfinlay
Users: 466,119
-2,096
Rating: 4.26
(4,071)
5 new ratings
Version: 12.6.2 (Last updated: 2024-12-16)
Creation date: 2016-08-17
Weekly download count: 11,549
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood:
Low risk likelihood
Manifest version: 2
Permissions:
  • storage
  • unlimitedStorage
  • clipboardWrite
  • http://*/*
  • https://*/*
  • activeTab
  • webRequest
  • webRequestBlocking
  • *://*.eth/
  • notifications
Size: 22.13M

Ranking

# 42
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Other platforms

MetaMask (v12.9.3)
2.94 (4,573) 16,000,000
MetaMask - Blockchain Wallet (v7.37.1)
4.54 (396,670) 36,467,223
MetaMask (v11.16.14)
3.50 (250) 3,264,086
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Add-on summary

Analyze keywords

An Ethereum Wallet in your Browser MetaMask is an extension for accessing Ethereum enabled distributed applications, or "Dapps" in your browser!

Watch an introductory video here.

The extension injects the Ethereum web3 API into every website's javascript context, so that dapps can read from the blockchain.

MetaMask also lets the user create and manage their own identities (via private keys, local client wallet and hardware wallets like Trezor™), so when a Dapp wants to perform a transaction and write to the blockchain, the user gets a secure interface to review the transaction, before approving or rejecting it.

Because it adds functionality to the normal browser context, MetaMask requires the permission to read and write to any webpage. You can always "view the source" of MetaMask the way you do any Chrome extension, or view the source code on Github: https://github.com/MetaMask/metamask-plugin

Enables access to: Web 3.0 Dapps

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User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
    Cons
    • Doesn't install, keeps loading.
    • Unusable, error adding Ledger.
    • Not stable.
    Most mentioned
    • Issues with installation.
    • Stability problems.
    • Errors when trying to add hardware wallets.
    User reviews
    by Firefox user 17716469, 2024-12-21
    by PJ, 2024-12-20
    by Firefox user 14892282, 2024-12-18
    View all user reviews

    Add-on safety

    Risk impact

    MetaMask requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

    Risk likelihood

    MetaMask has earned a fairly good reputation and likely can be trusted.

    Upgrade to see risk analysis details