Henry watches your open tabs so you don't have to. He pauses background videos the moment you leave them, and gently puts idle tabs to sleep — saving battery, energy and the planet!
No account needed · No data collected · Open source
Henry does three things exceptionally well — then gets out of your way. Everything else is there when you want it.
The moment you switch away from a tab with a playing video, Henry asks if you'd like to pause it. One click — done. Saves CPU, battery, and your sanity.
Henry scans for tabs you haven't visited in a while and flags them. Sleep them manually or turn on auto-sleep — tabs reload instantly when you return.
Henry surfaces tabs that have been idle longest so you can close them in one click — straight from the popup, no hunting through the tab bar.
Customisation
Henry never acts without your say-so. Enable auto-pause or auto-sleep if you prefer a hands-off approach.
Earn points for every eco action and level up through 8 unique animal companions, each with their own world and look.
Mark any tab exempt by URL — Henry will never touch it, even across browser restarts.
Add the extension to Chrome. Henry starts watching your tabs immediately — no setup required.
He notices when you leave a tab with a video playing, or when a tab hasn't been visited in a while.
A friendly card appears on your current tab. Pause the video, sleep the tab, or keep it — your choice.
Every eco action earns you points. Level up, build streaks, and watch your Eco Score grow.
Henry rewards you for real eco actions — no fake carbon numbers, just honest stats.
Per video paused in background
Per tab put to sleep
+10 pts per streak day, plus +5 every 10-day milestone
Per tab closed from Henry's queue
Each level unlocks a new animal companion with its own unique extension design and world. More companions are on the way. 🌍
Install in seconds, no account needed. Henry works immediately after installation.
Add Henry to ChromeChrome 102+ required · Manifest V3 · No external servers
Henry does not collect, transmit, or share any browsing data. All information — your points, stats, settings, and tab activity — stays entirely on your device using Chrome's local storage. Nothing ever leaves your browser.
Henry requires access to all tabs solely to detect background videos and identify idle tabs. No third party receives any data. There are no analytics, no tracking, and no servers.
Last updated: July 2026