Best Firefox Crypto Wallet Extensions for Web3 Users (2026)

Firefox users looking for crypto wallet extensions face a narrower field than Chrome users, but the options that do exist cover a wide range of Web3 strategies. MetaMask dominates with over 325,000 active Firefox users, while alternatives like Phantom, Enkrypt, Rabby, and Keplr each carve out distinct niches across chains, security models, and dApp ecosystems.

Several major wallets, including Coinbase Wallet and Magic Eden, do not offer Firefox extensions at all. That makes choosing the right wallet on Firefox less about preference and more about which tools are actually available for your workflow.

Top Firefox Crypto Wallet Extensions for Web3 in 2026

MetaMask remains the default choice for most EVM users on Firefox. The extension has 325,337 active Firefox users with a 4.2/5 rating from 4,318 reviews. Version 13.30.0, last updated May 15, 2026, supports Ethereum, Linea, BSC, Base, Arbitrum, Solana, Bitcoin, Cosmos, Avalanche, Cardano, XRP, Polygon, and Starknet. Its feature set now includes live threat surveillance and MEV/front-running protection.

Phantom, with over 15 million total users across browsers, supports Bitcoin, Ethereum, Solana, and Base through a single Firefox interface. It includes Ledger hardware wallet integration, built-in token swaps, and native NFT management without leaving the extension. Milk Road has described it as “probably the best wallet browser extension.”

Enkrypt, built by the MyEtherWallet team, takes a different approach. It supports 70+ natively integrated chains including Bitcoin (with Ordinals), Ethereum, Solana, Polkadot, and Avalanche. It is fully open-source under the MIT license, though its Firefox user base is far smaller at 1,964 active users as of its last update on February 25, 2026.

Rabby Wallet, built by the DeBank team, focuses on EVM security with transaction simulation that flags risky contract calls before users sign. Keplr covers the Cosmos ecosystem with support for 291 blockchains, including Ethereum, Base, and Berachain, plus built-in cross-chain swaps and in-wallet staking.

All five wallets are self-custodial, meaning users hold their own private keys and seed phrases. None of these extensions custody funds on your behalf.

Security First: The FoxyWallet Threat Firefox Users Must Know

Before installing any wallet extension, Firefox users need to understand the security landscape. Security firm Koi Security discovered 40+ malicious Firefox extensions impersonating MetaMask, Coinbase Wallet, Trust Wallet, Phantom, Exodus, OKX, Keplr, and MyMonero in a campaign dubbed “FoxyWallet,” active since at least April 2025 and attributed to a Russian-speaking threat actor.

The malware cloned open-source wallet codebases and embedded code that filtered input strings over 30 characters to intercept seed phrases and private keys. Stolen data, along with victims’ IP addresses, was transmitted to attacker-controlled servers.

Mozilla described the problem as “a constant cat and mouse game” and removed many flagged extensions, though some remained live as of July 2025. According to unconfirmed reports from The Hacker News, the campaign may have resulted in over $1 million in stolen crypto across 150+ fake extensions, with AI helping attackers scale the operation.

$1M in crypto gone—stolen by 150+ fake Firefox wallet extensions.

The scam: lookalike MetaMask, TronLink, Exodus add-ons that start clean… then turn malicious when no one's watching.

Now spreading to Chrome. AI is helping them scale.

Full story → https://t.co/APcWah1Fz

— The Hacker News (@TheHackersNews) August 8, 2025

Source: @TheHackersNews on X

This threat is directly relevant when evaluating Firefox wallet extensions. Hardware wallet compatibility (supported by MetaMask, Enkrypt, and Phantom via Ledger) adds a layer of protection, since private keys never touch the browser. Rabby’s transaction simulation provides another safeguard by previewing exactly what a contract call will do before the user approves it.

Firefox’s stricter extension permissions model offers some advantages over Chrome, but it does not eliminate the risk of installing a fake extension. The FoxyWallet campaign proved that the Firefox Add-ons store is not immune to supply-chain attacks targeting crypto users.

Which Firefox Wallet Fits Your Web3 Strategy?

For DeFi power users who interact with lending protocols, DEXs, and yield farms across EVM chains, MetaMask and Rabby are the strongest choices. MetaMask’s custom RPC support lets users add any EVM-compatible chain manually, while Rabby’s pre-signing transaction previews reduce the risk of approving malicious contracts. With Bitcoin testing key resistance levels and the Ethereum Foundation signaling structural changes, active DeFi participants need wallets that can keep pace across ecosystems.

Solana and multi-ecosystem users are best served by Phantom, which covers SOL, ETH, and BTC in one extension with native NFT display. Users tracking stablecoin developments, such as Tether’s expanding government partnerships, can manage assets across chains without switching wallets.

Open-source advocates and multi-chain portfolio managers should consider Enkrypt. Its MIT license means the code is fully auditable, and its 70+ chain support spans Ethereum, Polkadot, and Bitcoin ecosystems in a single interface. The trade-off is a much smaller user community, which can mean slower issue resolution.

Cosmos-focused users have one clear option: Keplr, with 291 supported blockchains and built-in staking. No other Firefox extension comes close for IBC-connected chains.

Regardless of which wallet you choose, verify every Firefox extension through the wallet’s official website before installing. Check the developer name, extension ID, and review count against the official listing. All five wallets listed here use the BIP-39 seed phrase standard, so recovery across wallets is possible if you need to switch. Self-custody means the seed phrase is your responsibility alone.

Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency and digital asset markets carry significant risk. Always do your own research before making decisions.