Tabnetic Autor: Alan Byrne

Stop drowning in windows. Pull your tabs together.

You've got six Firefox windows scattered across two monitors. Forty-seven tabs. At least three of them are the same Stack Overflow page. Sound familiar?

Tabnetic doesn't just shove all your tabs into one window and call it a day. It organizes them on the way in - grouping by domain, flagging duplicates, and giving you full control over what gets merged and what stays put.

🧲 Smart merge, not dumb dump
Click the toolbar icon and see every open window with a full tab preview. Check the windows you want to pull in, leave the rest. A live stats bar shows exactly how many tabs will move and how many duplicates will be cleaned up - before anything happens.

🧲 Auto-group by domain
After merging, your tabs are sorted into native Firefox tab groups — GitHub tabs together, YouTube together, Docs together. Each group gets a readable name and color. Groups with 5+ tabs auto-collapse to keep things tidy.

🧲 Duplicate detection
That Stack Overflow page you have open in three windows? Tabnetic spots it and removes the extras during merge. Duplicates are flagged in the preview so you can see what's getting cleaned up.

🧲 Snapshot & undo
Every merge automatically saves a snapshot of your window layout. Merged too aggressively? Restore any previous arrangement with one click. Up to 10 snapshots are kept.

🧲 Split groups back out
Changed your mind? Right-click any tab group and send it to its own window. Or use the Groups panel to split any group out. Tabnetic is a two-way tool — consolidate when you need focus, spread back out when you need space.

🧲 Container-aware
Uses Firefox Multi-Account Containers? Tabnetic preserves container identity when moving tabs. Your Work and Personal containers stay intact.

🧲 Privacy-first — zero data collection
Tabnetic doesn't collect any data or use analytics tools. The only permissions requested are tabs, tabGroups, storage, contextMenus, and cookies. No access to page content. No browsing history. No network requests. All snapshot data stays in local storage on your browser and is never transmitted anywhere.

Requires Firefox 140+ for native Tab Groups API and built-in data collection consent support.



How to use:
1. Click the Tabnetic icon from the window you want to keep
2. Check the windows you want to merge in
3. Toggle duplicate removal and auto-grouping as desired
4. Hit "Merge here"
5. Use the Groups tab to manage or split groups
6. Use the History tab to undo any merge