How to set up MetaMask on Firefox? (Browser Extension)

Installation Process

1. Navigate to the official MetaMask website using Firefox.

2. Click the “Download” button and select “Firefox Browser Extension” from the dropdown options.

3. The browser redirects to the Firefox Add-ons store page for MetaMask.

4. Click the green “Add to Firefox” button to begin installation.

5. Confirm the permission prompt by clicking “Add” when Firefox asks to grant access to browsing data and site interactions.

Initial Configuration

1. Once installed, a fox-shaped icon appears in the top-right corner of Firefox.

2. Click the icon and select “Get Started” to launch the onboarding flow.

3. Choose “Create a Wallet” if setting up for the first time.

4. Read and accept the terms and privacy notice before proceeding.

5. Enter and confirm a strong password—this unlocks the extension locally and does not recover your wallet.

Secret Recovery Phrase Handling

1. After password setup, MetaMask generates a 12-word secret recovery phrase.

2. Write down every word in exact order on physical paper—never digitally store or screenshot it.

3. Select “Next” and then manually re-enter each word in the correct sequence to verify retention.

4. Failure to input the phrase precisely blocks further progress—no recovery option exists if lost or misrecorded.

5. This phrase grants full control over all assets across any device where MetaMask is restored.

Network and Account Setup

1. MetaMask defaults to Ethereum Mainnet; users can add networks like Polygon, Arbitrum, or Base via Settings > Networks > Add Network.

2. Each network requires RPC URL, chain ID, currency symbol, and block explorer URL—official documentation provides verified values.

3. A default account named “Account 1” appears after setup with an Ethereum address visible under the account name.

4. Click the copy icon next to the address to share it for receiving tokens or NFTs.

5. Never share your private key or secret phrase with anyone—even support representatives claiming to assist.

Frequently Asked Questions

Q: Can I use the same MetaMask wallet on both Firefox and Chrome?A: Yes. Importing the same secret recovery phrase into MetaMask on another browser restores identical accounts and balances.

Q: Why does Firefox show a “Connection blocked” warning when connecting to some dApps?A: This occurs when the dApp’s domain lacks HTTPS or uses an untrusted certificate. MetaMask blocks connections to insecure origins by default for safety.

Q: Is it safe to keep large amounts of crypto in MetaMask on Firefox?A: MetaMask is a hot wallet—connected to the internet and vulnerable to malware or phishing. For substantial holdings, hardware wallets like Ledger or Trezor are strongly recommended.

Q: What happens if I forget my MetaMask password?A: You can reset the password using the secret recovery phrase. No password reset exists without that phrase—Firefox extension storage does not retain recoverable credentials.