NEX wallet extension mandatory?

Is chrome NEX wallet extension compulsory to participate in the NEX ICO?

From the website : Contribution wallet addresses To provide a contributing wallet address, you will need to download and install our Chrome NEX wallet extension. The wallet address that you provide in the lottery registration needs to be the same address that you provide for KYC. If you are a successful participant, and must match the address you send NEO/GAS from in the ICO contribution.