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MarvellousSuspender

A free, open-source Chrome extension - no ads, no tracking. Based on The Great Suspender, cleaned up and actively maintained.

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Suspendy Guy - The Marvellous Suspender mascot

The Marvellous Suspender

Free your memory. Suspend what you don't need.

A free, open-source Chrome extension - no ads, no tracking.
Based on The Great Suspender, cleaned up and actively maintained.

License: GPLv2 Manifest V3 Chrome ≥ 110 Crowdin


Once installed and enabled, this extension will automatically suspend tabs that have not been used for a default, or user-configurable, time interval. As a result, resources such as memory and CPU that the tab was consuming are freed.

If you have suggestions or problems using the extension, please submit a bug or a feature request.


Chrome Web Store

The Marvellous Suspender is available via the official Chrome Web Store.

For more information on the permissions required by the extension, see kb.marvellouscode.works/docs/TMS/permissions.


Install as an extension from source

Requires Google Chrome 110 or later (Manifest V3).

  1. Download the latest available version and unarchive to your preferred location.
  2. In Google Chrome, navigate to chrome://extensions/ and enable Developer mode (toggle in the upper right corner).
  3. Click Load unpacked extension....
  4. Browse to the src directory of the unarchived folder and confirm.

The "welcome" page will open indicating successful installation.

Be sure to unsuspend all suspended tabs before removing any other version of the extension - suspended tabs that are removed will disappear forever.

Build from source

Dependencies: openssl, npm.

npm install
npm run generate-key
npm run build

Output should end with:

Done, without errors.

The extension in .crx format will be inside build/crx/. You can drag it into chrome://extensions to install locally.

"This extension is not listed in the Chrome Web Store" - if Chrome prevents you from enabling the .crx, extract the .zip from build/zip/, navigate to chrome://extensions, click Load unpacked extension..., browse to the extracted folder, and confirm.


Contributing

Contributions are very welcome. Feel free to submit pull requests for new features and bug fixes. For new features, please raise an issue first so we can discuss the approach - this will go a long way to ensuring your pull request is accepted.

Localization (l10n)

Help localize the extension into your language via Crowdin: crowdin.com/project/tms.
If your language is not available, submit a feature request.

[!IMPORTANT]
Only en (English) and it (Italian) are maintained directly and can be relied upon as accurate.
All other languages were recently brought up to date with AI assistance to close large translation gaps - the result should be functional, but has not had a native-speaker review pass.
If you're fluent in one of these languages, corrections and improvements via Crowdin are very welcome.


License

This work is licensed under a GNU General Public License v2.


Marvellous Codeworks A Marvellous Codeworks project

Releases

Aug 10, 2026

Download .zip

A feature release (the "Always suspend" list) plus a cluster of long-standing bug fixes: Brave/Vivaldi Google Drive backup, the missing "Allow access to file URLs" toggle, suspended-tab favicons after...

Follow-up to 9.0.0 addressing the permission-model feedback raised in #411, plus the recovery guidance we posted for #410. Highlights

On-demand permissions: downloads and identity moved from uncondit...

Aug 3, 2026

v9.0.0 🚀

Download .zip

The Marvellous Suspender v9.0.0 A major release: session backup, tab health checks, a news feed, a visual redesign, and full localization coverage across all supported languages. Highlights

Session b...

Jun 25, 2026

Download .zip

What's Changed

Prevent extension tabs from being suspended by @rkodey #378 Fix Session (history) page to prevent long delays when favicons are not cached for old pages by @rkodey #379 Clean up the De...

Jun 19, 2026

Download .zip

What's Changed

Fix for Edge's version of the tab group bug by @rkodey in #376

Full Changelog: v8.1.4...v8.1.5