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Polkadot{.js} extension guide
Go to https://polkadot.js.org/extension, download and install the extension accordingly with your browser.

Open the extension, and click Understood, let me continue.
Note: Without doing this, app.neukind.jp will not able to launch the extension

Click the "+" plus icon in the middle of the extension

Write down your 12-word mnemonic seed and keep it in a safe place. This is extremely important! You will need the seed to recover the wallet later.

Click Next step if you are sure that you saved your seed
Input name, password for your account. Please save your password in a safe place, too. It is used to import/export your account.

Click Add the account with the generated seed when you are done
To backup your account, click three-dot on the right side of your account and choose Export Account. Then, input your password and click I want to export this account. It will download a JSON file. Please keep this JSON file secure. You will need it along with the password to import your accounts to the extension later.

