Manage, buy, sell, send, receive, and swap crypto assets with true ownership on Zelcore.
The Zelcore browser extension puts a non-custodial Web3 wallet inside Chrome, Brave and Edge. It connects to decentralized applications, signs transactions and lets you send, receive and swap from a toolbar popup, using the same seed phrase as the desktop and mobile wallets.
The extension covers a curated set of major assets across chains, including Bitcoin, Ethereum, Solana, Kaspa and Kadena. It is designed as a companion to the desktop wallet rather than a replacement: keep the full 80-chain portfolio, staking and hardware wallet pairing on desktop, and use the extension wherever a website needs a wallet.
Keys are generated and encrypted locally by the extension and never sent to Zelcore. Every dApp interaction is a request you approve or reject in the popup. A modern account is a BIP44 seed phrase, so the same phrase restores the extension, the desktop app and the phone.
Before signing, the extension shows what the site is asking for: the network, the amount, and the contract or recipient. Reject anything you did not initiate. Disconnect a site when you are done with it, and review connected sites regularly.
d2FA adds a PIN step for high-value transactions and sensitive settings, verified across a decentralized network rather than a single authentication server.
Hardware wallets (Ledger, Trezor) pair with the desktop wallet only. The extension carries a smaller asset list than desktop and mobile. Firefox is not yet available; Chrome, Brave and Edge install from the Chrome Web Store.
Connect to dApps: DeFi protocols, NFT marketplaces, games and any site that supports a browser wallet on the networks the extension covers.
Send, receive and swap supported assets directly from the popup.
Check balances and recent activity without opening the desktop app.
Receive funds in the browser by copying an address or showing a QR code from the popup, on any of the chains the extension supports.
Sign messages and transactions for the sites you approve, review the details before confirming, and revoke access when you are done.
Share one account with the desktop and mobile wallets, so anything you do in the browser is reflected everywhere.
A typical setup keeps the desktop wallet as the main vault and uses the extension for everything that happens in the browser. Because both are restored from the same seed phrase, the addresses are identical: a swap you approve in the extension shows up in the desktop portfolio, and funds you move on desktop are immediately available to the dApp you are using.
For larger balances, keep signing on desktop with a hardware wallet and keep only what you plan to use in the browser within reach of dApps. When a dApp asks to connect, review what it requests, and disconnect it afterwards from the extension settings.
Install only from the official Chrome Web Store listing. Brave and Edge use the same listing. Pin the extension to the toolbar so approvals are one click away.
Chrome: open the listing, click Add to Chrome, then open the extension and create or import an account.
Brave: same listing; Brave installs Chrome Web Store extensions directly. If Brave's built-in wallet is enabled, you may need to set Zelcore as the wallet sites should use.
Edge: same listing; Edge will ask once to allow extensions from the Chrome Web Store.
Already using Zelcore? Import your existing seed phrase and your addresses appear immediately. The setup guide covers the details.
Firefox: not yet listed. Follow the newsroom for the release.
After installing, write down the seed phrase if you created a new account, set a strong password, and pin the extension to the toolbar. If a site does not detect the wallet, reload the page after installing; most dApps only look for wallets when they load.
Zelcore has been developed since 2018 by InFlux Technologies, the team behind the Flux decentralized cloud. The extension shares its account model and release cadence with the desktop wallet; release notes are in the newsroom and documentation at docs.zelcore.io. For a wider introduction to dApp safety, see the Academy security guides.
