SleepyTabs - Beautiful Tab Suspender by Sato

SleepyTabs is a browser extension that helps you manage browser tabs by automatically putting inactive tabs to sleep to save memory and improve browser performance.

4.9 (7 reviews)

86 Users

You'll need Firefox to use this extension

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About this extension

SleepyTabs - Browser Tab Suspender & Manager

🚀 Boost Your Browser Performance

SleepyTabs is a browser extension that helps you manage browser tabs by automatically putting inactive tabs to sleep to save memory and improve browser performance.

✨ Key Features

🔄 Automatic Tab Sleeping - Save memory after your chosen inactivity period
🎛️ Intuitive Controls - Sleep or wake tabs with simple clicks or keyboard shortcuts
🎨 Beautiful Sleeping Pages - Customize with themes and wallpapers
⚙️ Flexible Configuration - Tailor to your exact preferences
🔒 Privacy Focused - Works entirely in your browser, no data sent externally

🛠️ Tab Management

Sleep tabs automatically after customizable inactivity periods
Whitelist important sites that should never sleep
Configure which tabs can sleep (pinned, audible, etc.)
Sync your settings across multiple browsers
Easily export/import your configuration

🎭 Themes

Choose from multiple designed themes:
- Dark (Default)
- Light
- Midnight
- Sepia
- Solarized
- Nord

Add beautiful wallpapers to your sleeping tabs with adjustable brightness!

⌨️ Keyboard Shortcuts

Put current tab to sleep: Ctrl+Shift+1
Sleep all tabs: Ctrl+Shift+2
Wake all tabs: Ctrl+Shift+3
Open SleepyTabs sidebar: Ctrl+Shift+4
Wake sleeping tabs: Enter

📥 Installation

Firefox

Chrome

🔐 Privacy First

SleepyTabs operates entirely within your browser. No data is sent to external servers, and all tab information is stored locally.

📝 Changelog

You can view the full change log here.

🤝 Contributing

Contributions welcome! Submit issues or pull requests to help improve SleepyTabs.

📜 License

SleepyTabs is licensed under the GNU Affero General Public License v3.0.

Rated 4.9 by 7 reviewers

Release notes for 1.2.10

Version 1.2.10 (August 26, 2025)

Bug Fix

Waking a tab only restores tab to original postion when waking from a Sleeping Group.

Version 1.2.9 (August 25, 2025)

New Features

New icon!! The original icon is now used as the "Restricted URL" icon.
Enable SidePanel in Chrome.
Added sidepanel toggle to context menu
Update Notifications
This will hold the update until you click on the notification. After clicking the notification, it will resleep any current sleeping tabs to ensure they are properly discarded.
Expermential Settings
Added experimental settings toggle to Advanced menu.
Enable experimental settings, a new Sessions link will appear in the footer.
Sleepy Sessions
SleepySessions allows you to save and restore tabs/windows/snapshots across browser sessions.
Various types of URLs are considered "restricted" by browsers. These are marked by the old SleepyTabs icon.
You can restore these without issue in most cases. When restoring a snapshot, a custom page will show a link for you to copy.

Core Improvements

Cleanup polyfill, no bloat.
Better debug logging.
Continued code optimizations, cleanup, and bug fixes.

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