This guide will help you to create a Polkadot.js wallet from the Polkadot.js extension that you can use in Mangata X as well as all Dotsama ecosystem.
Select your browser and download the extension.
A pop-up window will appear. Click either of the plus
(+) buttons to continue.
Write down the 12-word mnemonic seed back it up on a safe place. Check the box says “I have saved my mnemonic seed safely” and continue to next step.
<aside> 🔐 You can NEVER see your mnemonic seed again. Please make sure you wrote them down (preferably NOT on a digital environment) and stored in a safe place. You can always import your wallet from the 12-word mnemonic seed.
Only you will be able to see your wallet name. The password will be required whenever you want to sign a message and/or if you want to export & import your wallet as a .json file. Click “Add the account with the generated seed” to continue.
<aside> 🔐 You wont need your password if you import your wallet from 12-word mnemonic seed.
You have created a Polkadot.js wallet. You can select “Allow use on any chain” from the three dots on the right side of your account and use your account on any substrate based network.