Question 1

How do I install the Polkadot-js extension for local development?

Accepted Answer

For Chrome, run yarn build:chrome and load the unpacked build directory in chrome://extensions. For Firefox, use yarn build:ff and load it as a temporary add-on in about:debugging. The README provides step-by-step instructions.

Question 2

What's the difference between Polkadot-js extension and Talisman wallet?

Accepted Answer

Polkadot-js extension is a minimal signer focused on security and standards, while Talisman is a full-featured wallet with built-in UI, staking, and swapping features. Choose the extension for dapp integration and Talisman for user-facing wallet needs.

Question 3

How can I import an account with a derivation path in Polkadot-js extension?

Accepted Answer

When importing a seed, append the path and password in the format //////, as detailed in the README's mnemonics section. This supports advanced key management from tools like Subkey.

Question 4

Is the Polkadot-js extension safe for storing private keys?

Accepted Answer

It encrypts keys on disk with a password, but the mnemonic phrase itself isn't password-protected—if compromised, funds can be stolen. Always secure the mnemonic offline, as noted in the documentation.

Question 5

Can I use multiple signer extensions at once with a dapp?

Accepted Answer

Yes, the extension injects into window.injectedWeb3, allowing dapps to enable and use multiple compliant signers simultaneously. The API interface is designed for this ecosystem approach.

Question 6

How do I sign a transaction using the extension in my dapp?

Accepted Answer

Use the @polkadot/extension-dapp package to enable the extension, then access the signer interface to request signatures through the Polkadot-js API. The documentation includes code samples for integration.

Polkadot-JS Extension

What is Polkadot-JS Extension?

Overview

Use Cases

Best For

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Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions