Added the ability to block the opening of the interface built into the browser to view the source texts of the current page in the Chromium codebase. Blocking is performed at the level of local policies set by the administrator, by adding the "view-source:*" mask to the list of blocked URLs, configured using the URLBlocklist parameter. The change complements the previously present DeveloperToolsDisabled option, which allows you to close access to tools for web developers.
The need to disable the interface to view the page code is explained by the fact that resourceful students and schoolchildren use access to source texts to find the correct answers when passing tests in educational web platforms that check answers on the user's browser side. Including in a similar way, schoolchildren bypass tests based on the Google Forms platform. It is noteworthy that blocking "view-source: *" does not completely solve the problem and the student still has the opportunity to save the page using the 'Save as ...' menu for later searching for the answer in another program.
Source: opennet.ru