Get yourself a greyscale browser filter so photoshop isn't affected. This is the first result I got; I'm sure there are better ones
https://chromewebstore.google.com/detail/grayscale-screen/mc...
it is much easier just to set up accessibility color filter and then toggle greyscale mode with Winkey+Ctrl+C and you can keep using your apps without installing anything
it is much easier just to set up accessibility color filter and then toggle greyscale mode with Winkey+Ctrl+C and you can keep using your apps without installing anything