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Foarbyld fan SleepyTabs - Tab Suspender & Manager

SleepyTabs - Tab Suspender & Manager troch 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.

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Popup window, main tabSidebar MainAppearance tabAdvanced tabStandard Sleeping PagePage with themePage with theme and wallpaperSleepy SessionsSleepy Sessions
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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:
  1. Monitoring tab activity using browser events
  2. Storing tab information in the browser's local storage
  3. Replacing inactive tabs with lightweight placeholder pages
  4. 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:
  1. Clone the repository: git clone https://gitlab.com/satoru8/sleepytabs.git
  2. Install dependencies:
  3. Using Bun (recommended): bun i
  4. Using npm: npm install
  5. Run the extension:
  6. Using Bun:
    • For development: bun run build
    • For production: bun run package
  7. 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
  8. 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
Untwikkelersopmerkingen
Known issues:
1. Tab restoration can occasionally fail after browser crashes, restarts, or when the browser changes tab IDs internally.
  1. Use Screenshot seems to only work in specific situations when the popup is open on the active tab.

The extension source is available at: https://gitlab.com/satoru8/sleepytabs
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Tastimmingen en gegevensMear ynfo

Fereaske machtigingen:

  • Notifikaasjes werjaan
  • Koartlyn sluten ljepblêden benaderje
  • Browserljepblêden benaderje

Gegevenssamling:

  • De ûntwikkeler seit dat dizze útwreiding gjin gegevenssamling fereasket.
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1.3.7
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160,98 KB
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7 oeren lyn (24 sep. 2025)
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Allinnich GNU Affero General Public License v3.0
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De ûnwikkeler fan dizze útwreiding freget om stipe foar de trochgeande ûntwikkeling troch it meitsjen fan in lytse bydrage.

No bydrage

Utjefte-opmerkingen foar 1.3.7
Version 1.3.7 (September 23, 2025)
  • Fix an issue with some locales not showing up.
  • Better handling of wake up for groups.

Disable Use Groups appearance setting.

Note: Use Groups
I've removed this for the moment and will reintroduce it at a later time. It was more problematic than useful. I'd rather focus on stability than feature dumping. Since I rarely use tab groups, in my limited testing it seemed okay. After further use I decided this simply isnt ready yet. Apologies for any inconveniences.

Known Issues
- If Sleepy Tabs is reloaded in an open window, any sleeping page that is not discarded(unloaded) will be removed.
- Use Screenshot only seems to work if the popup was opened in the tab.
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