Apologies, this link should work: https://airdrop.hedgie.io/
Hedgie is a cryptocollectible, not a chrome add-on. Here's how it works: you buy a Hedgie (or buy more than one!), and use it to dig for crypto coin in a blockchain game. When your Hedgie finds coin, you can use it to make your Hedgie more powerful, or you can sell it on crypto exchanges. The airdrop is meant to give the first 500 people who sign up one free Hedgie ERC-721 token. One Hedgie token = one Hedgie!
In order to purchase a Hedgie and play the game, you will need to have Chrome installed and download the Metamask extension.