Devtoolster by Timo Reymann
Devtoolster is a browser extension that lets web applications register custom panels directly inside the browser's built-in DevTools — no overlays, no query-parameter hacks, just a clean panel alongside the native tools.
Extension Metadata
Permissions and data
Required permissions:
- Extend developer tools to access your data in open tabs
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.1.1
- Size
- 65.81 KB
- Last updated
- 9 days ago (Jul 28, 2026)
- Related Categories
- License
- MIT License
- Version History
- Add to collection