How do I add a channel to the Blocklist?

[slrgt]

I can't find any button or explanation on how to add a channel to the blocklist

[ImprovedTube]

there is/used to be a button on channel page (only) @Huhni fixed something about blocking channels today. (Not the button though)
You can try https://github.com/code-for-charity/ImprovedTube-for-YouTube/archive/refs/heads/master.zip or wait until the update.

maybe there will be more / faster fixes and updates if we send every contributor lots of nice food. but i dont really know.
i might also check it or i might be busy with other features and have to label some as legacy/no guarantees in the mean time.