Common questions.
Why does Windows show a security warning when I install?
Ctrl+X doesn't have a code-signing certificate yet — those are funded by future revenue. The SHA-256 hash of the .crx is listed on the Download page so you can verify the file yourself. The extension code is available on request.
Where is my data stored?
All data lives in chrome.storage.local (inside Chrome's profile directory on your machine) and umbrella-backup.json (written to your local disk by the native messaging host). Nothing is ever sent to a server, third party, or cloud service.
What does the native messaging host do?
The native host is a plain Python script registered via install.bat. Every time you save a window, Ctrl+X sends a message to the host, which writes a portable JSON copy of your collections to umbrella-backup.json. It starts and stops with each save — it does not run continuously in the background.
Will there be a paid tier?
Yes — Cloud Sync ($5/mo) is coming. It will add encrypted cross-device sync at app.ctrlx.avertxai.com. The free tier is permanent and will never lose features to make room for a paid tier.
Is this open source?
The extension code is available on request. It is not currently on a public repository, but that is on the roadmap.
What browsers are supported?
Any Chromium-based browser: Chrome, Edge, Brave, and Arc are all supported. Firefox is on the roadmap only — no ETA.
How do I uninstall?
Open chrome://extensions, find Ctrl+X, and click Remove. Then run uninstall.bat to remove the native messaging host registry key from Windows. On macOS/Linux, delete the host manifest file from the path registered during install.