Please i need some help

Accidentally, I deleted the subcategories from my main decks, and all my cards ended up in a single deck. I’m looking for an extension that makes it easier to switch between decks without having to constantly use CTRL+D. Does anyone know of any extension? I really need to rearrange my decks.

I’m not sure if there is an extension, but you can select multiple cards (ctrl+click to individually select notes/cards or shift+click to select a range) in the browser when using Ctrl+D.