I was able to remove the cat using uBlock Origin's element blocker. With the uBlock Origin extension installed, navigate to a eurorack page where the cat appears. Then right click on the page and you should see a "Block element" menu option with the uBlock logo next to it. Select that option and in the little box that pops up in the lower right paste in ###wrap-cat. You should see the cat highlighted in a red box to indicate that the rule you pasted in was able to find the right element to block. Lastly, click the "Create" button. The cat should be gone.