uBlock, the gold standard for browser ad block is implementing dark interface with the new update. The source code is out on GitHub, but the extension stores on Firefox and Chrome have not yet verified them. Along with the dark interface, uBlock will have an option to load the filter lists before any network connections loads.
Here are some previews of the interface:

The option to load the dark interface in uBlock settings:

The interface to load all the filters before loading network connects:

That’s it. You’ll be able to enjoy the dark interface when it hits the extension stores and is updated on your browser.