cookie auto delete isn't necessary you can set firefox to not remember cookies anyway ubo also has filter lists go remove cookie popups though it doesn't catch all of them so I won't say consent o matic is unnecessary but I don't use it and I very rarely see a cookie popup
My favorite is when webpages offer either "Accept all" or "Technically required only", as if anyone would ever want anything else than just the technically required.
For those already using unblock origin that don't know this: In the unlock settings you can enable additional filter lists. There are two for these cookie banners too. You never see these aids banners with it.