Is a great start for a program but as of 3/23/2022 it doesn't make the entire document darkened, there is also no drop down menu when clicking on the extension pin to toggle the dark mode on or off, just a small sliver of a drop down shows up but it looks like it might be in development so this might be fixed by the time you read this. these problems could also just be because it was made to work with chrome or edge better. so keep that in mind if you are using Firefox or other fox versions.