The ihavecookies CMP is currently not supported, and as a result, cookie banners on websites that use it continue to be displayed despite having the cookie banner blocker enabled in Firefox.

I managed to prepare for testing purposes a list of just a few different random websites that use this CMP, so if anyone is interested, I can share it somehow.

Web page: https://github.com/ketanmistry/ihavecookies

Screenshot showing what cookie banners from this CMP look like when they are not customized: