Merlin
Tab Preview On Hover

Tab Preview On Hover

Adds on-hover tab preview to Firefox (requires CSS theme).

What is Tab Preview On Hover?
Tab Preview On Hover is a Firefox add-on that adds on-hover tab preview functionality to the browser. By using a supporting CSS theme, users can see a preview of a tab by simply hovering over it. The add-on allows for customization of the timing and appearance of the tab preview.
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Merlin
Stats
Users: 103 ▲ 1
Version: 1.1 (Last updated: 2023-08-28)
Creation date: 2023-04-11
Weekly download count: 21
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
Permissions:
  • tabs
  • theme
  • <all_urls>
Size: 29.40K
URLs: Website
Stats date:

Chrome-Stats Rank

# 9646 ▼ 21
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Other platforms

Not available on Chrome
Not available on Edge
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Merlin
Summary
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What Does the Add-on & CSS Theme Do

With the add-on and the supporting CSS theme, tab preview will appear when a tab is hovered over.

There will be a delay before tab preview shows up. At the same time, if the cursor hovers from one tab over another tab, there’ll be no delay. If the cursor leaves the tab area for a short moment and goes back, the delay will come back. The behaviour is controlled by the CSS theme, user can simply change --preview-delay and --preview-delay-tolerance to adjust the timing.

How to Install the CSS Theme

  1. Go to about:support and locate Profile Folder
  2. Download or copy the CSS theme and move it into Profile Folder -> chrome
  3. Go to about:config and turn toolkit.legacyUserProfileCustomizations.stylesheets to true
  4. Restart Firefox

Compromises

  1. Background image for the browser navbar will be disabled
  2. Incompatible with built-in browser themes “System theme – auto” and “Firefox Alpenglow”
  3. Only the first ten tabs on the left will have tab preview
  4. Adaptive Tab Bar Colour can cause the tab preview to disappear at times, as it resets the browser theme whenever it changes the colour of the tab bar

Supporting CSS Theme

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User reviews
by Firefox user 14643647, 2024-04-25
by Firefox user 14643647, 2024-04-25
by Firefox user 14643647, 2024-04-25
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Safety
Risk impact

Tab Preview On Hover is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Tab Preview On Hover if you trust the publisher.

Risk likelihood

Tab Preview On Hover is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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Screenshots
Tab Preview On Hover Tab Preview On Hover