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Rabby Wallet Extension is a browser-based, self-custodial crypto wallet built specifically for Ethereum and EVM-compatible networks. Unlike wallets that require manual network configuration, Rabby automatically detects and switches to the correct chain when you connect to a decentralized application, removing a common source of transaction errors for users who operate across multiple chains . The extension is available for Chrome, Brave, and Edge, and is designed for desktop use rather than mobile browsers . Setup is straightforward: after installing from the official website, users either create a new address with a password and a 12-word seed phrase, or import an existing wallet via seed phrase, private key, or hardware device . The password encrypts local data but does not control funds—the seed phrase remains the master key, and Rabby does not store it, meaning loss of the phrase means permanent loss of access . A defining feature of Rabby is its transaction simulation and pre-signature risk scanning. Before a user approves a transaction, the extension previews the expected balance changes, allowing them to see exactly what assets will leave their wallet and what they will receive . This is paired with automatic security checks when connecting to DApps. Rabby displays whether a site is listed by platforms like Alchemy or DappRadar, shows site popularity based on traffic, and flags known malicious or phishing sites with a red warning. If risks are detected, the connect button is disabled by default, requiring users to consciously override the warning if they choose to proceed . The wallet natively supports over 90 EVM networks without manual RPC entry, including Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Base, and Avalanche . It aggregates tokens, NFTs, and DeFi positions across all supported chains into a single portfolio view, so users do not need to switch networks just to check balances . Built-in swap and bridge functions allow token exchanges and cross-chain transfers without leaving the extension, comparing rates across liquidity providers . For users who prioritize cold storage, Rabby offers native integration with a wide range of hardware wallets, including Ledger, Trezor, GridPlus, OneKey, Keystone, and BitBox02 . Connecting a Ledger, for example, involves selecting the hardware wallet option during setup, unlocking the device, opening the Ethereum app, and authorizing the connection—after which the Ledger addresses appear alongside software wallets in the same interface . Rabby is open-source and regularly audited by security firms, a transparency measure that allows the community to verify its code . The extension has accumulated a substantial user base, with Chrome Web Store listings showing over 900,000 users and a 4.5-star rating from roughly 2,870 reviews . For EVM users who frequently interact with DApps across multiple chains and want transaction visibility before signing, Rabby positions itself as a security-focused alternative to more basic browser wallets