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Documentation Index

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Tab cloaking lets you replace Zeno’s browser tab title and favicon with those of a different website. From a distance — or in a school or workplace environment — the tab looks like an ordinary productivity page. The underlying URL does not change; only the visible tab metadata is affected.

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How cloaking works

When you apply a cloak, Zeno does two things:
  1. Sets document.title to the chosen title string.
  2. Updates the <link rel="icon"> element in the page head to point to the chosen favicon URL.
Both values are saved to localStorage so the cloak is automatically re-applied every time the page loads, even after a browser restart.
Cloaking only changes the tab title and favicon. The URL in the address bar remains unchanged. It does not affect browser history or network traffic.

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Activating cloak

There are two ways to open the cloak interface:
1

From the dashboard app grid

Click the Presence button (the incognito-figure icon) in the app grid. The cloak modal opens immediately.
2

From Settings

Navigate to Settings → Tab Disguise (Cloaking). The preset grid is shown inline — click any preset to apply it immediately as a live preview.

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Preset identities

The cloak modal offers six built-in presets. Each preset sets both a title and a real favicon fetched from the target site.
PresetTab titleFavicon source
Google ClassroomGoogle Classroomssl.gstatic.com/classroom/favicon.png
Khan AcademyKhan Academykhanacademy.org/favicon.ico
Google DocsGoogle Docsssl.gstatic.com/docs/documents/images/favicon5.ico
DesmosDesmos Graphingdesmos.com/assets/img/icons/favicon.ico
WikipediaWikipediaen.wikipedia.org/favicon.ico
QuizletQuizletquizlet.com/favicon.ico
Click a preset card to select it. The tab title and favicon update in a live preview pane inside the modal before you confirm.

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Custom title

Below the preset grid is a text input labeled Custom Title. Type any string to use a title not covered by the presets. The preview updates as you type. When a custom title is entered, the favicon defaults to the Google Classroom icon unless you also selected a preset whose favicon you want to keep. 
Example custom titles:
  Schoology
  Clever — Log in
  Canvas

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Cloak status badge

The Presence button in the app grid has a small dot in the top-right corner:
  • Gray dot — no cloak is active.
  • Yellow pulsing dot — a cloak is currently applied.
The badge pulses with a subtle animation. If you have reduced motion enabled, the animation stops but the yellow color remains.

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Deactivating cloak

1

Open the cloak modal

Click the Presence button on the dashboard or go to Settings → Tab Disguise.
2

Clear the cloak

In the dashboard modal, click REMOVE. In Settings, click the None preset tile to clear the active cloak.
3

Confirm

The tab title reverts to ZENO and the favicon returns to favicon.ico. The localStorage entries zeno-cloak-title, zeno-cloak-favicon, and zeno-cloak-active are all removed.

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Persistence details

Cloak state is stored across three localStorage keys:
KeyValue
zeno-cloak-active"1" when a cloak is active; absent when inactive
zeno-cloak-titleThe current tab title string
zeno-cloak-faviconThe favicon URL (only set when a preset favicon is used)
On every page load, Zeno reads these keys and re-applies the cloak before the page is visible. The transition is invisible to anyone watching the tab.
If you share a browser profile with others, removing the cloak before closing Zeno prevents the disguised tab title from persisting for the next user.

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