It prevents opening new tabs, blocks key combinations that would normally allow you to disable focus tools, and restricts mouse movements that could reveal brow

It prevents opening new tabs, blocks key combinations that would normally allow you to disable focus tools, and restricts mouse movements that could reveal browser tabs or elements. Browser extensions like Freedom do not prevent such. Example situation: I started to solve physics questions but drifted away after sometime by opening VSCode or switch to reading something on Wikipedia which is unrelated to my primary objective.