Hi all, I have made an extension for the test case highlighting which works in dark mode. Since the new update has been made by MikeMirzayanov it doesn't fit good for dark mode users, so I made an extension which will highlight the testcases appropriately in the dark mode. Here is the Link for the extension Codeforces TestCase Dark Mode.
Currently this extension is available only on firefox. And Finally thanks MikeMirzayanov for this amazing platform. Hope you like it!
I will try to make it available on chrome soon.