Mozilla is testing a new feature in Firefox Nightly that lets you attach lightweight notes to individual tabs. The goal is simple: help you remember why you kept a tab open, streamlining multi-tab browsing and preserving context. The tab notes are designed to be unobtrusive, letting you jot a quick reminder—whether it's a research point, a login, a to-do, or a link to follow up later—without cluttering your workspace. In this experimental build, you can add, edit, or delete notes that stay tied to each tab, with a small icon or panel providing glanceable reminders as you switch between tabs. By integrating notes directly in the tab strip, Mozilla aims to reduce decision fatigue and fragmentation during busy sessions. This feature aligns with Mozilla's broader experiments to boost productivity for power users while browsing. To try it yourself, install Firefox Nightly, the cutting-edge developer channel where this tab-note feature is under active development. Coverage of the feature has appeared in outlets such as Digital Trends as part of ongoing Firefox experiments.