change the theme of firefox everytime I close it.

Great but seems like not working on stackoverflow recently

I'm just trying it out and I am happy thus far with the dark reader. I don't think I should experience anything weird.

Một plugin tuyệt vời giúp mắt của tôi đỡ mỏi khi sử dụng máy tính trong thời gian dài.

Works well when it comes to the end result but slows the browser down considerably, pages take much more time to load.