Add dark mode please

dark mode when

If you do a search on "dark mode", you will find this has been asked for many times, it would be extremely time-consuming so they are not planning to add dark mode anytime soon, and there is a workaround with a free browser extension.

There is a recent detailed response in this thread: https://support.khanacademy.org/hc/en-us/community/posts/28968234637709-Dark-Mode