Trust Wallet — Get this Extension for Firefox (en-US)

A detailed, user-focused guide to installing and using the Trust Wallet browser extension in Firefox (English — US). Learn how to set up the extension, connect to dApps securely, manage tokens and NFTs, use advanced security practices, and troubleshoot common problems.

What is the Trust Wallet Firefox extension?

The Trust Wallet extension brings Trust Wallet’s non-custodial functionality to your desktop browser. It injects a Web3 provider into web pages so decentralized applications (dApps) can request connections and signatures. The extension stores private keys locally (encrypted under a password), offers account and network management, supports multiple EVM-compatible chains, and provides a convenient way to interact with DeFi, NFT marketplaces, and other Web3 services from your Firefox browser.

Why use the Firefox extension?

Desktop dApp workflows are commonly optimized for browser wallets. Using the Trust Wallet extension on Firefox gives you:

Convenience: Quick, persistent browser access to Web3 sites without switching devices.
Local custody: Your private keys remain on your machine, encrypted by your extension password.
Multi-account support: Create or import multiple accounts and switch between them while browsing.
Developer compatibility: Many dApps expect an injected provider like the one the extension provides, so integrations are seamless.

Before you install — security checklist

Browser extensions are powerful; take a few precautions first:

Install only from official sources (the extension store linked from the official Trust Wallet website). Avoid third-party or mirrored downloads.
Have your recovery phrase backed up offline before importing or creating a wallet in the extension.
Prefer a dedicated browser profile for crypto activities to reduce extension conflicts and cross-site tracking.
Consider using a hardware wallet for large balances — the extension may support hardware integrations for signing.

How to install Trust Wallet extension on Firefox

Open the Firefox Add-ons site or official Trust Wallet page. Use your browser to visit the official Trust Wallet website and follow the "Get Extension" link, or search for the extension in the Firefox Add-ons store. Verify the publisher name and the extension’s review count before proceeding.

Click “Add to Firefox.” In the add-ons page, click the “Add to Firefox” button. Firefox will show requested permissions and ask you to confirm installation.

Grant permissions and install. Carefully review required permissions and allow only what’s necessary. After installation, the extension icon will appear in your toolbar; pin it for easy access.

Open the extension and choose an action. Click the pinned extension icon. You’ll be prompted to create a new wallet, import an existing wallet using a recovery phrase, or connect via a mobile pairing method if supported.

Secure the extension with a strong password. If you create a new wallet or import one, the extension will ask you to set a password. This password encrypts your local vault — choose a long unique password and consider using your browser profile password manager for convenience if you trust it.

Creating vs importing a wallet

When you first open the extension you can either create a new wallet or import an existing one. Key differences:

Create: The extension will generate a new seed phrase. Immediately write down the phrase on physical media (paper or metal) and store it offline in two secure locations.
Import: Importing uses an existing seed phrase — this is the typical flow if you already use Trust Wallet mobile or another BIP39-compatible wallet. Import only in a secure environment (avoid public Wi-Fi and shared machines).

Connecting to dApps in Firefox

Most Web3 websites support detection of injected providers. To connect:

Open the dApp (e.g., a decentralized exchange or NFT marketplace) in Firefox.
Look for the “Connect Wallet” or "Connect" button and select Trust Wallet (or the generic injected provider option).
The extension will prompt you to approve the connection and optionally choose which account to expose to the dApp.
Approve the connection — the dApp can now request transaction signatures or message signatures when needed.

Only connect to sites you trust. A connected dApp can query your public addresses and request transaction approvals; it cannot move funds without your explicit signature for each transaction.

Signing transactions and message prompts

Whenever a dApp asks to send a transaction or sign a message, the extension will show a detailed prompt listing:

Destination address and value (if sending funds).
Gas / fee estimate and network name.
Contract call details when applicable (function name, parameters) — read these carefully.

Good habits:

Always verify the recipient address by comparing it with the dApp UI or known address list.
Check gas fees before confirming; if gas looks unusually high, cancel and investigate network conditions.
When a contract request appears (token approval, swap, liquidity operations), review the function and, if possible, the contract address shown in the prompt.

Managing networks and tokens

The extension supports multiple EVM-compatible networks (Ethereum, BSC, Polygon, Avalanche, etc.). You can:

Switch the active network to match the dApp’s expectations.
Add custom RPC endpoints for testnets or lesser-known networks (advanced users only).
Add custom tokens by pasting the token contract address; this makes balances visible and enables transfers.

NFTs, approvals & allowances

When interacting with NFTs (ERC-721 / ERC-1155) the extension will request signature approval for transfers or marketplace listings. For fungible tokens (ERC-20) many dApps request an approval which gives a contract permission to spend tokens on your behalf. Best practices:

Avoid unlimited approvals — if a dApp offers an option to limit allowance, prefer that.
Use allowance management tools periodically to revoke unneeded permissions.
For high-value NFTs or sales, consider moving them to a separate account or use a hardware wallet for signing.

Security considerations specific to browser extensions

Browser wallets are convenient but add exposure vectors compared to mobile or hardware-only workflows. Reduce risk by:

Using a separate Firefox profile dedicated to crypto to limit cross-site contamination from other extensions.
Regularly auditing installed extensions and removing unused or suspicious ones.
Disabling the extension or using a locked browser profile when not interacting with dApps.
Setting up the extension password and using an OS-level disk encryption (FileVault, BitLocker) for additional safety.

Hardware wallet integration

If you hold large balances, pair the extension with a supported hardware wallet. The extension can act as an interface while the private keys remain on the hardware device, requiring physical confirmation for each signature. Benefits include:

Private keys never exposed to the browser environment.
Physical confirmation prevents remote attacks from draining funds.
Ability to use the convenience of the browser while maintaining hardware-level protection.

Troubleshooting common issues on Firefox

Extension not visible: Make sure it is enabled in Add-ons & Themes and pinned to the toolbar.
dApp doesn't detect the wallet: Refresh the page, ensure the network matches (e.g., Ethereum mainnet vs testnet), and try reconnecting.
Transaction stuck: Check the network explorer for the tx hash; if pending due to low gas, some networks support replacing or canceling the transaction with a higher fee.
Imported wallet missing tokens: Add custom token contracts or switch to the correct network to view balances.
Extension crashes or behaves oddly: Restart Firefox, try a clean profile, or reinstall the extension after backing up your seed phrase.

Privacy & data handling

The extension necessarily exposes public addresses to connected websites. Non-sensitive metadata (account labels) is stored locally. Optional features such as analytics or remote price feeds may contact external services — review extension settings and privacy policy to understand what data is transmitted and whether it can be disabled.

Advanced tips for power users

Use multiple derived accounts (from the same seed) to segment risk: one for cold storage, one for trading, and one for dApp interactions.
Use a VPN and a dedicated, updated browser when interacting with unfamiliar contracts.
Keep a small hot wallet balance in the extension and store the bulk of assets in an offline hardware wallet.
Periodically export a public-only list of addresses to verify incoming funds or perform reconciliation with block explorers.

Where to get official help

For security-sensitive problems (lost seed phrase, suspected compromise) use official Trust Wallet channels and documentation. Never share your recovery phrase, private keys, or extension password with anyone, even if they claim to be support staff.

Conclusion

The Trust Wallet extension for Firefox is a powerful tool for desktop Web3 workflows — bridging convenience and non-custodial control. It is ideal for users who want fast dApp access from their browser but it carries responsibilities: secure backups, disciplined signing, and careful site vetting. Combine the extension with best practices — dedicated profiles, hardware wallet pairing, and allowance audits — and you can enjoy a productive and secure Web3 experience on Firefox.

Visit Official Trust Wallet