In a normal browser session, professors generally cannot see which Chrome extensions you have installed — Canvas has no built-in extension scanner. But Canvas quiz logs do automatically record tab-switching through a `page_blurred` event, and lockdown or proctoring browsers are an entirely different story.
This guide separates the myths from the mechanics: what Canvas actually logs, what the `page_blurred` flag really means, where a tool that stays on the page fits, and where extensions stop working altogether.
What Canvas Quiz Logs Actually Record
Every Canvas quiz attempt generates a log automatically. Instructors do not set anything up — the moment a student starts an attempt, Canvas begins recording a timeline of activity that the teacher can open later from the student's submission.
That log is built from a fixed set of event types. Knowing them tells you exactly what a professor can and cannot infer from a standard Canvas quiz, without any extra proctoring software installed.
None of these five events name your browser extensions, read your other tabs, or capture your screen. They record timing and focus on the quiz page itself — nothing more.
- `session_started` — marks the moment the attempt begins.
- `question_answered` — records when you enter or change an answer.
- `question_flagged` — records when you flag a question to revisit.
- `page_blurred` — fires when the quiz-taking page loses focus (the tab-switch signal).
- `page_focused` — fires when you return to the quiz-taking page.
The page_blurred Flag Explained
Of the five events, `page_blurred` is the one students should understand best. It fires whenever the Canvas quiz-taking page loses focus — switching tabs, opening a new window, or clicking away all trigger it. In the instructor's log it appears in plain language as "Stopped viewing the Canvas quiz-taking page."
A paired `page_focused` event records when you come back, so the log effectively timestamps every moment you left and returned. This is the main tab-switch red flag instructors look at. A single blur while a notification popped up means little; a series of long blur events clustered around the hardest questions is the pattern that draws attention.
The important limit: `page_blurred` records that you left and for how long. It does not record where you went, what you opened, or which extensions you have. It is a focus signal, not a surveillance feed.
New Quizzes and IP Logging
Canvas New Quizzes logs the same event types described above, plus one addition worth knowing about: it can capture the student's IP address (with permission) alongside the attempt.
That matters less for detecting extensions and more for detecting location or device patterns. An IP address can hint that an attempt was started from an unexpected network, or that two accounts were used from the same connection. It is still not an extension scanner — it is a network-level detail attached to the log.
The practical takeaway is that New Quizzes gives instructors slightly more context than classic quizzes, but the core picture is the same: automatic focus and timing events, now with a location clue.
Where a Tool That Stays on the Page Fits
Here is the honest connection between the logs and how QuizSolve is built. Because the tab-switch flag is `page_blurred`, a tool that works on the quiz page itself — without making you switch to another tab or window — does not generate a `page_blurred` event. There is no focus change to record, so that particular flag never fires.
That is exactly what QuizSolve does. It reads the question inline on the Canvas page and shows an answer and explanation there, so you are not leaving the quiz-taking page to look something up. This is the truthful basis for calling it screen-share safe: it does not trip the tab-switch flag that Canvas logs by default.
Be precise about what that claim covers, though. "Does not trigger `page_blurred`" is not the same as "undetectable in all cases." It is one specific signal on a standard Canvas quiz. The next section explains where that reasoning stops applying entirely.
Staying on the page avoids the `page_blurred` flag. That is a real, narrow benefit — not a promise that any tool is invisible to every monitoring system.
The Hard Boundary: Lockdown & Proctoring Browsers
Everything above assumes a standard Canvas quiz taken in ordinary Chrome. Proctoring and lockdown browsers break that assumption completely, and this boundary needs to be stated plainly.
Respondus LockDown Browser, ProctorU Guardian, and Proctorio run the exam inside a secured, locked-down environment. In that environment, Chrome extensions cannot operate at all — they are blocked or never loaded. QuizSolve does not work there, and no extension does. That is a design limitation of every browser extension, not a shortcoming of one product.
These are separate layers stacked on top of Canvas. Canvas itself has no built-in Chrome-extension detection, but screen-recording proctoring, webcam proctoring, and lockdown browsers each add monitoring or restrictions that Canvas alone does not have. If your exam uses any of them, assume extensions are off the table.
- Lockdown browsers — secure the environment and disable extensions, new tabs, and outside apps.
- Screen-recording proctoring — captures your screen activity for later review.
- Webcam proctoring — records or monitors you through the camera during the attempt.
What This Means for You
Separate the two questions students usually blur together. "Can professors see my Chrome extensions?" is generally no on a standard quiz. "Can professors tell if I switch tabs?" is often yes, through `page_blurred`. Those are different mechanisms with different answers.
Before any graded exam, find out which environment it runs in. If it is a plain Canvas quiz, the logs record focus and timing but not your extensions. If it uses a lockdown or proctoring browser, extensions are blocked and you should rely on your own preparation.
The honest bottom line: a tool that stays on the page, like QuizSolve, avoids the tab-switch flag on standard Canvas quizzes — and stops working the moment a proctoring layer takes over. Know which one you are facing before you decide anything.
Key takeaways
- "Can professors see Chrome extensions" and "can professors see tab-switching" are two different questions — the first is usually no, the second is often yes via `page_blurred`.
- A tool that stays on the quiz page and never forces a tab switch does not generate a `page_blurred` event, which is the honest reason QuizSolve is described as screen-share safe.
- That safety is specific to the tab-switch flag. It does not mean any tool is undetectable in every setup — proctoring layers change the picture entirely.
- Before you rely on any tool, confirm whether your exam uses a lockdown browser or webcam proctoring, because those environments block extensions outright.
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FAQ
Can professors see which Chrome extensions I have installed?
In a standard Canvas or Blackboard quiz taken in normal Chrome, professors generally cannot see the list of extensions installed on your device. The LMS runs as a website in your browser and has no built-in scanner that enumerates your extensions, and Canvas ships no such feature. That changes the moment a **lockdown browser** or **proctoring tool** is involved: those systems are designed to inspect and restrict the browser environment, and many will detect or disable extensions before the exam starts. So the honest answer is that visibility depends entirely on the layer running the exam, not on Canvas alone.
Does Canvas detect browser extensions during a quiz?
Canvas itself does not have a built-in Chrome-extension detector. What Canvas does have is an automatic quiz log that records events like `session_started`, `question_answered`, `question_flagged`, `page_blurred`, and `page_focused` for every attempt. None of those events name your extensions. The `page_blurred` entry only tells the instructor that you left the quiz-taking page — it cannot see why. If your course pairs Canvas with a separate proctoring or lockdown layer, that add-on may inspect extensions, but plain Canvas does not read them.
What is a page_blurred event in Canvas quiz logs?
`page_blurred` is one of the events Canvas logs automatically during a quiz attempt. It fires whenever the quiz-taking page loses focus — for example, when you switch to another browser tab, open a new window, or click away from Canvas. In the instructor's log it appears as "Stopped viewing the Canvas quiz-taking page," and a matching `page_focused` event records when you return. It is the main tab-switch red flag instructors look at. It does not capture what you opened or which extensions you use; it only marks that your attention left the quiz page and when it came back.
Can professors tell if you switch tabs on a Canvas quiz?
Often, yes. Because Canvas records `page_blurred` and `page_focused` automatically, an instructor reviewing your quiz log can see each time the quiz-taking page lost focus and how long you were away. Frequent or long blur events, especially clustered around hard questions, are exactly the pattern instructors flag. This is why staying on the page matters. A tool that works directly on the quiz page without forcing you to switch tabs does not trigger `page_blurred`, so it does not create that particular signal — though it is only one signal among several a proctored exam might use.
Do lockdown or proctoring browsers block Chrome extensions?
Yes, and this is the hard boundary. **Respondus LockDown Browser**, **ProctorU Guardian**, and **Proctorio** run your exam inside a secured, locked-down environment rather than ordinary Chrome. In that environment, Chrome extensions cannot operate at all — they are blocked, disabled, or simply never loaded. QuizSolve does not work under these systems, and no browser extension does; that is a limitation of every extension by design, not something specific to one tool. If your exam requires one of these browsers, treat any extension as unavailable and plan to rely on your own preparation instead.
