About this extension

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
NFTs
erc20
tokens
ICOs
erc271
...and more!

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Release notes for 9.0.5

- [#10278](https://github.com/MetaMask/metamask-extension/pull/10278): Allow editing transaction amount after clicking max
- [#10214](https://github.com/MetaMask/metamask-extension/pull/10214): Standardize size, shape and color of network color indicators
- [#10298](https://github.com/MetaMask/metamask-extension/pull/10298): Use network primary currency instead of always defaulting to ETH in the confirm approve screen
- [#10300](https://github.com/MetaMask/metamask-extension/pull/10300): Add origin to signature request confirmation page
- [#10296](https://github.com/MetaMask/metamask-extension/pull/10296): Add origin to transaction confirmation
- [#10266](https://github.com/MetaMask/metamask-extension/pull/10266): Update `ko` localized messages
- [#10263](https://github.com/MetaMask/metamask-extension/pull/10263): Update `id` localized messages
- [#10347](https://github.com/MetaMask/metamask-extension/pull/10347): Require click of "Continue" button to interact with swap screen if there is a price impact warning for present swap
- [#10373](https://github.com/MetaMask/metamask-extension/pull/10373): Change copy of submit button on swaps screen
- [#10346](https://github.com/MetaMask/metamask-extension/pull/10346): Swaps token sources/verification messaging update
- [#10378](https://github.com/MetaMask/metamask-extension/pull/10378): Stop showing the window.web3 in-app popup if the dapp is just using web3.currentProvider
- [#10326](https://github.com/MetaMask/metamask-extension/pull/10326): Throw error when attempting to get an encryption key via eth_getEncryptionPublicKey when connected to Ledger HW
- [#10386](https://github.com/MetaMask/metamask-extension/pull/10386): Make action buttons on message components in swaps flow accessible

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