
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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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
🛠️ Tab Management
🎭 Themes
Choose from multiple professionally designed themes:
Add beautiful wallpapers to your sleeping tabs with adjustable brightness!
📂 Sessions
⌨️ Keyboard Shortcuts
Usage
Basic Controls
Configuration Options
Advanced Options
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:
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:
The extension will be built and saved in the
License
SleepyTabs is licensed under the GNU Affero General Public License v3.0
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
- For development:
- 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
- For development:
- 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
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- 1.3.7
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Utjefte-opmerkingen foar 1.3.7
Version 1.3.7 (September 23, 2025)
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.
- 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.
Mear útwreidingen fan Sato
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- Der binne noch gjin wurdearringen
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- Der binne noch gjin wurdearringen
- Der binne noch gjin wurdearringen
- Der binne noch gjin wurdearringen
1. Tab restoration can occasionally fail after browser crashes, restarts, or when the browser changes tab IDs internally.
The extension source is available at: https://gitlab.com/satoru8/sleepytabs