SleepyTabs - Beautiful Tab Suspender av 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.

4.7 (7 reviews)

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SleepyTabs - Browser Tab Suspender & Manager

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
🎯 Context Menu: Right-click on a tab/page for SleepyTabs options.
🌐 Sync Settings: Synchronize settings across multiple browsers
📦 Import/Export: Easily import/export your settings
📂 Sessions: View and restore recently closed tabs/windows and snapshots

🛠️ 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 professionally designed themes:

Dark (Default)
Light
Midnight
Sepia
Solarized
Nord

Add beautiful wallpapers to your sleeping tabs with adjustable brightness!

📂 Sessions

Recently Closed Management: Easily restore or forget recently closed tabs and windows
Session Snapshots: Create, edit, and restore snapshots of your current browser session
Tab Tagging: Organize tabs with customizable tags and colors
Filtering: Filter tabs by domain, time closed, and tags

⌨️ 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

Usage

Basic Controls

Put Tab to Sleep: Sleeps the current tab
Sleep All Tabs: Sleeps all eligible tabs
Wake All Tabs: Restores all sleeping tabs

Note: The "Put Tab to Sleep" button bypasses whitelist settings and other tab exclusion rules, allowing you to manually sleep any tab. The automatic sleep and "Sleep All Tabs" features will respect your whitelist and other settings.

Configuration Options

Put tabs to sleep after: Set the inactivity time before tabs sleep (in minutes)
Maximum active tabs: Set a limit on how many tabs can remain active
Auto-wake tabs when clicked: When enabled, sleeping tabs automatically wake up when clicked
Themes: Customize the appearance of the sleeping pages
Wallpaper settings:
Enable/disable custom wallpapers
Set custom wallpaper URL
Adjust wallpaper brightness
Tab grouping: Configure automatic tab grouping options
Tab title prefix: Choose from emoji prefixes (💤, 😴, 🛌, 🌙, 🔕, ⏸️) or set a custom prefix

Advanced Options

Customize check interval for inactive tabs
Set grace period for tab sleeping
Configure which types of tabs can sleep:
Audible tabs
Active tabs
Private tabs
Loading tabs
Tabs requesting attention
Pinned tabs
Grouped tabs
Reader mode tabs
Experimental features toggle

Whitelist

Add domains or URLs to the whitelist to prevent specific sites from being put to sleep.

Technical Details

SleepyTabs is made for Firefox with support for Chrome.

SleepyTabs is built using browser extension APIs and works by:

Monitoring tab activity using browser events
Storing tab information in the browser's local storage
Replacing inactive tabs with lightweight placeholder pages
Restoring tabs to their original state when needed

Privacy

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

Contributing

Contributions are welcome! Feel free to submit issues or pull requests to help improve SleepyTabs.

📥 Installation

Firefox || Chrome

🚀 From Source

If you want to build and test SleepyTabs, you can follow these steps:

Clone the repository: git clone https://gitlab.com/satoru8/sleepytabs.git
Install dependencies:
Using Bun (recommended): bun i
Using npm: npm install
Run the extension:
Using Bun:
- For development: bun run build
- For production: bun run package
Using npm/Node.js:
- For development: node build.js
- For production: NODE_ENV=production node build.js
- For both browsers: BUILD_BOTH=true node build.js
Load the extension in Firefox or Chrome

The extension will be built and saved in the distF (Firefox) & distC (Chrome) directories. Packaged zips will be available in the artifacts directory.

Note: The project is optimized for Bun, but can work with Node.js. You may need to set environment variables manually when using Node.js directly instead of Bun.

License

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

Utvecklarens kommentarer

Known issues:
1. Tab restoration can occasionally fail after browser crashes, restarts, or when the browser changes tab IDs internally.
2. We've implemented several safeguards to handle these edge cases, including:
- Primary UUID tracking instead of relying solely on tab IDs
- Restoring from original URL when ID/UUID matching fails
- Session storage backup for catastrophic recovery

Recent improvements:
- Completely redesigned tab tracking system using persistent UUIDs
- Restore button when tabinfo cant load.
- Better safeguards when something does go wrong.
- Session recovery
- Added comprehensive data management tools for troubleshooting
- Improved tab group handling and preservation
- Added side panel support for better tab management

The extension is fully open source and available at: https://gitlab.com/satoru8/sleepytabs

Betyg 4,7 av 7 recensenter

Versionsfakta för 1.3.5

Version 1.3.5 (September 16, 2025)

Show the update version number in the Update Notice.
Some visual updates to the changelog page.
Various updates to the wake up and restore tabs. Prefer UUID. As tabIds can change between sessions. (Will need to continue to ensure this works in all cases.)
i18n updates. Current Locales, EN, ES, FR, CN, JP.
Translations still need more work.

New Features

Discard Only

New Advanced setting. If enabled, tabs will be discarded(unloaded) only, instead of using a sleeping page. This offers the same amount of resource savings without any appearance features.

Data Manager

New feature, allows you to clear/delete specific extension data.
If you've been using SleepyTabs for a month+. It might be a good idea to Wake All Tabs, then clear all data.

Other

Privacy
Added a privacy policy. You can find it here

Added the "data_collection_permissions": none, as per the firefox policy. Give it a read here

Notes
Thats about it for this one. Hopefully, we should be around 99% bug-free in terms of sleep/wake functionality. Feedback, bugs, issues, suggestions? Feel free to join the discord or drop a msg on the gitlab. Reviews always appreciated!

SleepyTabs - Beautiful Tab Suspender av Sato

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