chromecraftlab
Index / Case study 02
Issue
โ„– 02
Client
FocusFlow
Industry
Productivity
Year
2026

FocusFlow โ€” Tab discipline for deep work

A focus timer extension that auto-archives distracting tabs during sessions and brings them back when you finish.

FocusFlow โ€” Tab discipline for deep work
The outcome
01
+62%
Self-reported productivity gain
02
88%
Session completion rate
03
3,400+
Active accounts
The story

FocusFlow's previous build kept losing tab references after a service-worker shutdown. We refactored to use chrome.storage.session as the source of truth, with chrome.alarms as the timer driver โ€” both survive worker recycling.

The result is a focus timer that genuinely cannot lose your tabs, plus a 23 KB side-panel UI that shows your current session, queue, and a small heatmap of last week. Power users get a JSON export of their session log.

Sample interfaces

In the wild