DevTools Theme: Cobalt2 Unofficial
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-17.
A highly customized dark theme for Devtools.
A customized dark theme for Chrome DevTools based on Wes Bos' Cobalt2.
To enable custom Devtools themes you need to change some settings in Chrome first:
1. Go to chrome://flags/#enable-devtools-experiments and enable Devtools Experiments.
2. Restart chrome. Hint: type chrome://restart in your address bar and hit enter to restart quickly, your tabs will be saved.
3. Open Devtools and go to settings (inside the overflow menu next to the close button).
4. Under the left navigation, click "Experiments".
5. Check the box for "Allow custom UI themes".
6. Close and reopen Devtools, you should now see the Devtools theme you've installed.
Latest reviews
please add Operator Mono font family support. Just add this line to your stable.css and canary.css: *{ font-family: "Operator Mono, Menlo, Monaco, 'Courier New', monospace" } and add this to your manifest.json: "permissions": [ "fontSettings" ]
