If there is one thing TMS users have asked for more than anything else over the years, it is this: please don't let me lose my sessions. A browser profile wipe, a clean OS install, an accidental extension removal, and everything is gone. TMS has always saved sessions inside Chrome's storage, but Chrome's storage lives and dies with the browser profile.

The feature/session-backup branch changes that.

TMS has been quietly getting better for years, new bugfixes, compatibility patches, a full Manifest V3 migration, but the extension's visual identity never kept up. The settings pages still looked like a relic of 2018. The popup was fine, but only barely. Nothing matched the Marvellous Codeworks website.

That changes with TMS 9.

This is the first in a series of posts we're calling Road to TMS 9, a chance to show you what's being built on the feature branches before it ships, explain the decisions behind the changes, and hear from you before things are set in stone. Think of it as development in the open.

Today: the visual redesign.

If you are using Microsoft Edge and noticed that your suspended tabs inside tab groups disappear or turn into blank New Tab pages after a browser restart, you are running into the same Chromium-level regression that first appeared in Chrome 149, and it is now reaching Edge users too.

A targeted fix release addressing the tab group restore regression introduced by Chrome 149, where suspended tabs inside tab groups were silently discarded after a browser restart.

If you are using Chrome 149 and noticed that your suspended tabs inside tab groups turn into blank New Tab pages after a browser restart, you are not alone, and it is not your fault.

The Marvellous Suspender has been a fork since day one, born in 2021 out of The Great Suspender, at a time when that project had been pulled from the Chrome Web Store and flagged as malware. TMS cleaned up what needed cleaning and gave orphaned users somewhere to go. Fair enough, that's exactly what a fork is for.

But five years later, TMS isn't a patched-up copy of someone else's abandoned code anymore. It's had a full Manifest V3 rewrite, a proper visual redesign, its own contributors, and, as of a few months ago, a home under the Marvellous Codeworks name. The GitHub fork relationship, though, hadn't changed: technically, gioxx/MarvellousSuspender was still listed as a fork of the original repository, tied to its network, its issues, its history.

A targeted patch for Vivaldi users who were experiencing crashes related to a browser-specific API inconsistency.

A maintenance release with a handful of quality-of-life improvements to the session management page, the suspended tab watermark, and the update banner.

A focused patch release that fixes the annoying "new version available" banner showing up repeatedly even after TMS was already up to date.

TMS 8.1.0 is a significant feature release. Tab Groups are now a first-class citizen, favicons are more reliable, and the suspended tab page can now follow your OS theme automatically.