@dirkie: Hello Dirkie,
I already replied on your suggestion on Chrome Extension store. Here is what I replied:
There already was a suggestion for this option. Unfortunately this feature is not possible at this moment. With disliked title Netflix changes its UI into gray scale which is clearly visible within code as well. This is not true for liked titles. Netflix in no way changes anything about liked title and therefore there is no way to determine if title is liked or not until you move your cursor over the title and like/dislike button loads up. This would mean that you would still see your liked titles until you move your mouse over it and then it would disappear. Such behaviour would be on one hand pointless and on second confusing.
Sorry for inconvenience, but until Netflix changes this behaviour in their UI there is nothing that I can do.
Have a nice day,
Martin