so in helping a student I found out about some off market Chrome extensions that create a dark mode.
A few months ago we had a situation where a student test the questions were not visible because they were black on black. When I met with the student, I found out she was using an after market Chrome extension called Better Canvas.. (I found another one with some of the same things Canvas +).
She had been using it for nearly two years with no problem. We found that in the HTML code of the quiz, there was a SPAN tag that made all text black - this was generally not a problem on the bright white screen but so while she was using the extension for Dark Mode, it created a black on black on situation and she could not read her exam.. (It was inconsistent too.. we figure it was from copy and paste from word - some questions you could not see the question, and others you could not see the choices). It was a crazy experience. However, as I tested it, it was a comfort to my eyes and floaters.
So here was the takeaway I offered the student.
1) if you choose to use it, make sure to still visit Canvas at least weekly, it summarizes due dates etc.. and so it is not reliable and she may miss something.
2) Pay attention to the data rights you are giving such an extension.. as an admin, I got that thing off my computer as soon as possible.. it has reading and writing privileges that are a data breach waiting to happen.
3) if using such a extension makes you miss a deadline etc.. it is on her as a student, as it is not an officially supported tool.
As a student you are an adult, but know when you give away control of the LMS to a third party tool (whose origin you don't really know) you are taking that risk yourself.
Hope that helps..
Terri