this extension is extremely good and has alot of configurations of all sorts, i have been using this for a long time in other browsers and this extensions just makes everything better on youtube

If you want full control over your YouTube theme, then this is for you! Tons of setting presented in a nice, clean manner. Has the power to create really anything you want. It's definitely not a 1 click solution, but if you want a crazy, super-animated YouTube, want to replicate the olden days, or just want to replicate the olden days, there's no better extension. Seriously underrated; excellent work!