I remember there being a browser extension for Codeforces that adds a dark theme and even includes snowflakes. I can’t recall the name, though. Does anyone know which extension this is? And also tell the name of it?

Edit : I found it. It is Dark Reader. If u know any other ones i appreicate it.

Why it is impossible to send solutions to last div2 round?

When i saw that contest was starting it was already 30 min passed. So i didn't join. But i want to send solution to one of the problem.

And now i can't send anything. Most of the time after system testing i could send solution. Can anyone tell why?

Codeforces team should really do smth about these.