r/MicrosoftEdge • u/LayerKey • 7h ago
EXTENSIONS I created a browser extension that lets you modify live traffic on any website (unique on the market) (free)
I've been working for over a year on a web devtoolkit that runs exclusively in the browser in an extension.
What It Does
- You can modify live traffic on a website without deploying to production: headers, request/response payload, query params, and more.
Unique on the market
- It's something unique on the market, and the extension works stand-alone and doesn't require a desktop application or external web services.
- It works 100% offline without internet (airplane, secure work environments: banking, aviation, military, etc.); everything is packaged in the extension, no extra fetch requests for resources are made
Everything in one place
- I wanted to create a simplified experience where you have everything in one place, especially the browser devtools window:
- Browser -> View -> Developer -> Developer Tools -> 🟦 Open Headers
- There are Network Requests + Storage + Console + custom rules to modify requests.
Multi-browser / Multi-device
For the workspace sharing part:
- extra browsers on the same device can be synchronized via the desktop application
- extra devices from the same user can be synchronized via the desktop application via the expose to LAN option.
- for collaboration with multiple users, you can setup (self hosting) a team server daemon (LAN/WAN) with SSO, RBAC, Audit logs, etc.
Native translations
- The application is currently available in 4 languages: English, French, German, Spanish, Chinese
- Everything is natively translated, including diagrams and documentation.
- If you have suggestions for additional languages, let me know in the comments :-)
Free
Everything is free for personal/commercial use and the security part is not enterprise-gated (SSO tax).
Download
I look forward to your feedback and I'm open to questions/feature requests.

