How to install Dapper?
You can easily install it on your Chrome browser or Android phone (iPhone not yet released) but this in our opinion is the easiest way to buy on OpenSea.
And here is their FAQ if you have a few questions you need to answer:
How to top-up my Dapper account?
Copy your Dapper address by clicking on the copy icon in the top right corner of your Dapper extension, paste it in the ‘send’ field of your existing wallet, and choose how much ETH you want to send.
If you’re wondering how to purchase ETH, head over to ‘How To Get ETH’.
You can also check out more ways to use different wallets with OpenSea’s own Getting Started Guide
PS: Remember it is not possible to use MetaMask and Dapper together at the same time, you can only use one wallet.