tab-muster-extension

Tab Muster

A Chrome extension that automatically groups your tabs by website. When two or more tabs share a domain, they fold into a single named, colored group — click it to expand, and the tab stays out of the way until you need it.

Load it locally (unpacked)

1. Open chrome://extensions
2. Turn on Developer mode (top right)
3. Click Load unpacked
4. Select this folder (tab-muster-extension)

The extension icon appears in your toolbar. Open a few tabs from the same site (e.g. two GitHub tabs) and watch them fold into a group.

Settings

Click the toolbar icon for a quick on/off toggle and a “Group open tabs now” button, or open Settings for:

• Minimum tabs required before a site is grouped
• Collapse new groups automatically
• Group by root domain (docs.google.com + mail.google.com → one google.com group) or by exact subdomain
• A list of sites to never auto-group

How it works

background.js watches for tabs finishing navigation. For each window, it buckets ungrouped tabs by domain and:

• adds a tab to an existing same-domain group if one exists
• creates a new group once a domain reaches the configured minimum tab count

It also respects manual ungrouping — if you drag a tab out of a group, Tab Muster won’t pull it back in until it navigates to a different site.

Privacy

No data leaves your browser. See privacy.html.