It kind of breaks everything.

This reminds me of a similar extension for reddit. https://chrome.google.com/webstore/detail/shine-for-reddit-beta/acoiihnnfofnpbnofdcgcapbjlcopifa

It supposedly make facebook faster. But for me it loads tree times as long. I like the idea but why left navigational sidebar takes so much space? I don't see any purpose of that at all.

I really like it but it made my facebook spanish, when I have it set in English.

While I like this, Facebook is ever changing so support for something like this will have to be massively updated often.