MetaMaskとは何ですか？

MetaMaskはhttps://metamask.ioによって開発されたChromeの拡張機能で、その主な機能は「An Ethereum Wallet in your Browser」です。

拡張機能のスクリーンショット

MetaMask拡張機能のCRXファイルをダウンロード

MetaMask拡張子のファイルをcrx形式でダウンロードし、ブラウザにChrome拡張機能を手動でインストールするか、crxファイルを友達と共有して簡単にChrome拡張機能をインストールします。

拡張機能の使用方法

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

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.

MetaMask also helps warn you when you navigate to sites that are known to have engaged in phishing, or that have names that are suspiciously similar to popular phishing targets.

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-extension

Enables access to:
Web 3.0
Dapps
NFTs
erc20
tokens
ICOs
erc271
...and more!

拡張機能の基本情報

名前	MetaMask
ID	nkbihfbeogaeaoehlefnkodbefgpgknn
公式URL	https://chromewebstore.google.com/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn
説明	An Ethereum Wallet in your Browser
ファイルサイズ	20.98 MB
インストール数	17,000,000
現在のバージョン	11.10.1
最終更新日	2024-03-01
公開日	2020-05-04
評価	3.09/5 合計 3774 レビュー
開発者	https://metamask.io
Eメール	[email protected]
支払い方法	free
拡張機能のウェブサイト	https://metamask.io
ヘルプページのURL	https://metamask.zendesk.com/hc/en-us
プライバシーポリシーページのURL	https://consensys.net/privacy-policy
対応言語	id,ms,de,en,fil,fr,sw,nl,no,vi,tr,ca,da,et,es,es-419,hr,it,lv,lt,hu,pl,pt-BR,pt-PT,ro,sk,sl,fi,sv,cs,el,sr,bg,ru,uk,iw,fa,mr,hi,bn,gu,ta,te,kn-IN,ml,th,am-ET,ar,zh-CN,zh-TW,ja,ko
manifest.json
{ "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx", "author": "https:\/\/metamask.io", "background": { "page": "background.html", "persistent": true }, "browser_action": { "default_icon": { "16": "images\/icon-16.png", "19": "images\/icon-19.png", "32": "images\/icon-32.png", "38": "images\/icon-38.png", "64": "images\/icon-64.png", "128": "images\/icon-128.png", "512": "images\/icon-512.png" }, "default_title": "MetaMask", "default_popup": "popup.html" }, "commands": { "_execute_browser_action": { "suggested_key": { "windows": "Alt+Shift+M", "mac": "Alt+Shift+M", "chromeos": "Alt+Shift+M", "linux": "Alt+Shift+M" } } }, "content_scripts": [ { "matches": [ "file:\/\/\/", "http:\/\/\/", "https:\/\/\/" ], "js": [ "disable-console.js", "globalthis.js", "lockdown-install.js", "lockdown-run.js", "lockdown-more.js", "contentscript.js" ], "run_at": "document_start", "all_frames": true }, { "matches": [ ":\/\/connect.trezor.io\/\/popup.html" ], "js": [ "vendor\/trezor\/content-script.js" ] } ], "default_locale": "en", "description": "__MSG_appDescription__", "icons": { "16": "images\/icon-16.png", "19": "images\/icon-19.png", "32": "images\/icon-32.png", "38": "images\/icon-38.png", "48": "images\/icon-48.png", "64": "images\/icon-64.png", "128": "images\/icon-128.png", "512": "images\/icon-512.png" }, "manifest_version": 2, "name": "__MSG_appName__", "permissions": [ "storage", "unlimitedStorage", "clipboardWrite", "http:\/\/localhost:8545\/", "https:\/\/.infura.io\/", "https:\/\/.codefi.network\/", "https:\/\/chainid.network\/chains.json", "https:\/\/lattice.gridplus.io\/", "activeTab", "webRequest", ":\/\/.eth\/", "notifications" ], "short_name": "__MSG_appName__", "content_security_policy": "frame-ancestors 'none'; script-src 'self' 'wasm-unsafe-eval'; object-src 'none'", "externally_connectable": { "matches": [ "https:\/\/metamask.io\/" ], "ids": [ "*" ] }, "minimum_chrome_version": "89", "version": "11.10.1" }