I decided I didn't like where betterCanvas was going when they rewrote it and added accounts and subscriptions, so I went to their github, reverted to the MIT license so they can't do anything about it, and added more features.
I want this to be the FOSS version of the current extension, so nobody has to keep being pushed to make an account or pay to make their canvas look better.
Github: https://github.com/GuySandler/CanvasRefined