Hides the metrics-/box-model-pane from DevTools. Usage: 'Allow extensions to load custom stylesheets' in DevTools > Experiments.
Users
45
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#113K
#94K among extensions
Version
0.9.8
updated 21 Feb 2025
Users
monthly, 3 years
Latest, 16 Oct 2026:45 usersMove the mouse over the chart for any month
Ratings count
monthly, 3 years
Latest, 16 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About No-Metrics-Pane (slimmer DevTools)
Slimmer DevTools hides the "Metrics" panel in DevTools.
For many developers, this box is rarely useful but takes up valuable space, allowing only a few CSS properties to be visible at a time. Slimmer DevTools removes it, letting you see more properties at once and work more efficiently.
### Enable/Disable
To enable, open `DevTools (F12) > Experiments` and activate "Allow extensions to load custom stylesheets," then restart DevTools.
To toggle Slimmer DevTools on or off, go to Chrome extensions and adjust as needed.
### Built for Simplicity
Designed to reduce clutter in DevTools – inspired by this [StackOverflow thread](https://stackoverflow.com/questions/66691662/is-there-a-way-to-hide-the-box-model-graphic-in-chrome-developer-tools).