metamask-extension VS MyEtherWallet

Have an Ethereum wallet, preferably Metamask installed.

A  Metamask Account.

Plenty of projects are source-available, but not open source, and get tons of issues, and even contributions (https://github.com/MetaMask/metamask-extension off the top of my head)

You can create an attestation based on an existing schema or create your own. Schemas define the format in which attestations will be made, and in this case, we will use the Is Human schema to attest that the owner of a certain address is human. For this example, you only need to connect your Metamask wallet (or any wallet) to Scroll Sepolia, then enter the address you want to attest and click Make attestation. You can choose whether you want the off-chain attestation, i.e., free, obtained only by signing a transaction. Alternatively, you can choose to make it on-chain and pay for the transaction to make it public and connect it to smart contract logic. In this case, you will need to obtain funds in Scroll Sepolia through a Scroll Sepolia Faucet.

Metamask (9000 GitHub Stars) https://github.com/MetaMask/metamask-extension

For this tutorial you will need Metamask or other wallet of your choice, with Scroll Sepolia funds that you can get from a Sepolia faucet and then bridge them to L2 using the Scroll Sepolia bridge. Alternatively, you can use a Scroll Sepolia Faucet to get funds directly on L2.

16) Open Metamask app. In this instruction we will use Metamask extension for Chrome browser.

> I get a 3-5 sec lag on launch [0] as it prepares the browser to block ads.

uBO is typically ready in a fraction of second, so "3-5 sec" is not normal. In Firefox all extensions sit in the same process, so it's possible another extension is preventing uBO to be ready in a timely manner, this has happened[1].

[1] https://github.com/MetaMask/metamask-extension/issues/13163

offline nonce issue #4387

My Ether Wallet (MEW)

If neither of these options work, I would suggest sticking with Chrome and perhaps trying another Ethereum wallet for your transaction (such as MyEtherWallet or Taho) - and seeing if the error persists across not only different browsers, but 3rd party wallets too.

Download https://github.com/MyEtherWallet/MyEtherWallet

To make an offline wallet, go to the releases page on github: https://github.com/MyEtherWallet/MyEtherWallet/releases

Have you tried any deprecated MyEtherWallet versions or perhaps MyCrypto - or any other Ethereum wallets that can have Ledgers connect via hardware wallet? Taho (formerly TallyHo) might be a decent option worth trying as well?