Short answer: Look for a Canvas-specific Chrome extension that blocks focus, blur, and visibility events during quizzes, not a generic ad blocker or incognito workaround.
| Feature | Why it matters | Canvas Ninja |
|---|---|---|
| Blocks focus/blur events | Stops tab-switch log entries | Yes, Privacy Guard |
| Canvas-specific | Targets quiz pages without breaking the web | Yes |
| Answer backup | Protects typed quiz responses | Yes, Answer Saver |
| AI help | Study assistance inside Canvas | Yes, Smart Answers |
See the install page at Canvas Ninja Chrome Extension.