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Miden wallet extension setup and seed phrase security guide



Secure Your Miden Wallet Extension Setup and Manage Seed Phrase Safety

Install the browser add-on exclusively from the project's official distribution channel, never from third-party sites. Before initiating the installation, verify the developer's name and review permissions requested by the software; legitimate tools require only basic interaction with visited pages.


During the creation of a new vault, the interface will present a sequence of 24 words. This mnemonic code is the absolute master key: it generates all account addresses and authorizes any fund movement. Write each term in the exact order on durable, non-digital media like steel plates or specialized punch cards. Immediately duplicate this record and store the copies in separate, physically secure locations, safe from environmental damage.


Treat this word list with the highest level of confidentiality. No legitimate service will ever ask you to transmit it. Input the phrase only into the trusted add-on interface itself, solely for recovery purposes. Any exposure to other software, websites, or cloud storage fundamentally compromises your entire portfolio, as possession of these words equates to ownership of the assets.


Finalize the process by establishing a robust local password. This secondary secret encrypts the add-on's storage, adding a necessary layer of protection for daily use. While the 24-word sequence restores everything across any compatible client, this password remains device-specific and is not recoverable if forgotten.

Miden Wallet Extension Setup and Seed Phrase Security Guide

Install the software directly from the official browser store, never from third-party links or email attachments.


During the initialization, the tool will generate a unique 24-word mnemonic recovery sequence; this is the master key to your entire portfolio and funds.


Immediately transcribe these words in their exact presented sequence onto durable, non-digital media like stainless steel plates or specialized cryptosteel cards, which resist fire and water damage far better than paper.


Never store a digital copy–no screenshots, cloud notes, or text files–as these are primary targets for remote malware and automated scraping attacks.


Split the recorded phrase, storing halves in two separate, physically secure locations such as a bank safety deposit box and a home safe to mitigate total loss from a single disaster.


Validate the backup by performing a full restoration in a isolated, temporary environment before depositing any significant assets, ensuring every word was captured correctly.


Configure a strong, unique password for the local vault within the add-on itself, adding a mandatory second layer of protection even if your browser profile is compromised.


Treat this recovery cipher as the absolute sovereign over your on-chain assets; its confidentiality is non-negotiable, and sharing it with any service or individual guarantees irreversible theft.

Installing the Miden Wallet Extension in Your Browser

Navigate directly to the official browser store for your chosen application; for Chromium-based clients like Chrome or Brave, this is the Chrome Web Store, while Firefox users must visit the Mozilla Add-ons portal. Locate the program by its precise name, confirm the developer's identity matches the project's official entity, and initiate the "Add to Browser" command–this process typically completes within ten seconds, after which the utility's icon will appear adjacent to your address bar.


BrowserCorrect SourcePost-Installation ActionChrome, Edge, BraveChrome Web StorePin the tool from the extensions menu (puzzle icon).FirefoxMozilla Add-ons siteGrant requested permissions for full functionality.

Creating a New Wallet and Recording Your Seed Phrase

Initiate the vault generation process within the add-on's interface; the system will produce a unique mnemonic recovery sequence, typically consisting of 12 or 24 distinct words.


Transcribe this lexical key manually with pen on durable, non-digital media like steel plates or specialized cryptosteel cards. Verify each term's spelling twice against the screen. Never store this data digitally: avoid photographs, cloud notes, or text files. Your transcription must be a perfect, letter-for-letter copy. Create two identical physical copies for geographically separate, fire-resistant storage locations.


Isolate the recovery sheets from internet-connected devices permanently.
Never share the lexicon, even with support personnel; legitimate services will never request it.
Treat the paper or metal record with the same confidentiality as the asset container's private access codes.

FAQ:
I installed the Miden wallet extension but my seed phrase is 24 words. I thought it was supposed to be 12. Is this normal?

Yes, this is completely normal. The Miden wallet uses a 24-word seed phrase by default, which is a common and secure standard. While some wallets use 12 words, a 24-word phrase provides a higher level of security due to the increased number of possible combinations. You should always expect and write down the full 24 words provided during the Miden wallet setup. Never use a self-generated 12-word phrase for it.

Can I store my seed phrase as a screenshot or a text file on my computer for backup?

No, you should never store your seed phrase digitally in this way. Saving it as a screenshot, in a text file, or in an email makes it vulnerable to malware, hacking, or unauthorized access to your device. The only secure method is to write it down by hand on a durable material like paper or metal and store that physical copy in a safe, private location. Digital storage defeats the core security purpose of a seed phrase.

What happens if I lose my computer or my browser data gets cleared? Will I lose my funds if I only have the extension?

If you only have the wallet extension installed and lose access to it, your funds are at risk. The extension is just a tool to access your wallet on that specific device. Your actual wallet and funds exist on the blockchain. To recover access from any new device, you must use your original 24-word seed phrase. This is why writing down and securely storing the seed phrase during setup is the single most important step. Without it, recovery is typically impossible.

Is it safe to type my seed phrase into the wallet extension when restoring access?

It is safe only when you are absolutely certain you are using the genuine Miden Wallet first time setup wallet extension, downloaded from the official source like the Chrome Web Store or Firefox Add-ons. Before entering any words, verify the extension's authenticity. Once confirmed, typing your phrase into the official extension's restore interface is a standard and secure procedure. However, you should never type your seed phrase into any website, pop-up window, or software that is not the verified wallet extension itself.

I've written down my phrase. Should I also set up a password in the extension, and what does it protect?

Setting a separate password in the Miden wallet extension is a good practice, but it protects something different than your seed phrase. This password only secures the local wallet session on your specific browser and device. It locks the extension, preventing someone with physical access to your computer from making transactions. It does not protect your seed phrase or help recover your wallet. If you forget this password, you can uninstall and reinstall the extension and use your seed phrase to regain access, as the password is not stored on the blockchain.