I'm looking for cloud-based or open-source software simulators of visual disabilities, such as color-blindness, glaucoma, etc. that non-disabled testers can use.
Check the level of accessibility achieved in the design and development of web pages in order to allow access to all people regardless of their distinguishing features .
Perhaps another option could be the Colour Contrast Analyser (CCA) which has a simulator to see your interfaces in different modes. This software is not integrated in the web browser but is useful.
When you set-up the CCA you go the "Image" item in the main menu and select the "Select window (List)" or the "Select image file" or my favorite the "Screen" option.