"No NFT Twitter Shapes" hides the NFT feature that Twitter recently added. Twitter developed a NFT compatibility by adding a new type of profile picture that let's people know that your current image is an NFT by changing the rounded shape by a hexagonal one. This extension aims to hide this new type of images to get rid of this crypto-trend on the platform. So with that extension enabled you only will see rounded shapes. This extension is currently in development, so if you experience any issues let me know.