The short version
- No usage statistics, no crash reports and no Krypton account.
- Your history, tabs, workspaces, themes and Boosts stay on your computer.
- uBlock Origin is built in and blocks ads and trackers from the first page.
- Features that need outside servers stay off until you turn them on, and say what they share first.
- This website sets no cookies and runs no analytics.
What stays on your computer
Like any browser, Krypton keeps a profile on your computer: your history, bookmarks, open tabs, cookies and site data, downloads list, and settings. Krypton adds its own: workspaces and their tabs, folders, themes, layout choices, Boosts and routing rules. All of it lives in your Windows user profile and is not uploaded anywhere.
When you import from Arc, Dia, Helium, Thorium or another browser, Krypton reads that browser’s profile on the same computer. The import does not go through the internet.
You can clear your browsing data from Krypton’s settings at any time.
What Krypton never sends
- Usage statistics. Krypton does not measure how you use it and report it back.
- Crash reports. Crash uploading is switched off.
- Your browsing. There is no Krypton account and no Krypton server that receives your history, searches or tabs.
Krypton is built on Chromium, ungoogled-chromium and Helium. The Google services that Chromium normally calls are removed or switched off, and the services Helium would normally call are disconnected.
When Krypton goes online by itself
A few things need the internet even when you are not browsing. Each one is listed here.
- Updates
- Shortly after it starts, Krypton checks for a new version on itsGitHub releases page. GitHub receives your IP address and the request, as with any download. Updates are signed, checked against a key built into Krypton, and installed only after you close the browser.
- Ad and tracker filter lists
- uBlock Origin keeps its filter lists up to date by downloading them from their publishers, using its own list catalog and settings. You can change which lists it uses in uBlock Origin.
- Extensions
- When you install or update an extension, Krypton downloads it from the Chrome Web Store, which is run by Google. Google’s terms and privacy policy apply to the store.
- Secure DNS, if you turn it on
- With DNS over HTTPS on, the names of sites you visit are looked up through the provider you choose. Krypton sends those requests with fewer headers than Chromium normally does.
Optional features
These are off when you install Krypton. In Settings, under Privacy, each one explains what it does and what it shares, and the ones that carry more risk ask you to confirm before they turn on. You can turn any of them off again there.
| Feature | What it does | What it shares when on |
|---|---|---|
| Protected video and music (Widevine) | Plays DRM-protected video and music on streaming sites. | Downloads the Widevine module, and later its updates, from Google’s component update servers. The same request can fetch certificate-revocation updates. Google sees your IP address and browser version. |
| Live Caption | Captions speech in videos and calls. | Downloads the speech engine and language packs from Google’s component update servers. The audio itself is processed on your computer and is not uploaded. |
| Autoplay with sound for well-known media sites | Lets a list of popular media sites start playing with sound. | Downloads that list, and its updates, from Google’s update servers. |
| Online search suggestions | Suggests searches as you type in the address field. | Sends what you type to your chosen search engine as you type it, before you press Enter. |
Websites and search engines
The websites you visit, and the search engine you choose, receive what any browser sends them: your IP address, the pages you ask for, and the cookies they set. Their own privacy policies apply. uBlock Origin blocks many of the ads and trackers they load, but no blocker catches everything.
A Boost only changes how a site looks on your computer. It does not send anything to the site or to anyone else.
This website
- No cookies, no analytics, no ads. krypton.run loads no third-party scripts, and its fonts are served from this site.
- Stored on your device. If you choose a dark or system theme, the choice is kept in your browser’s local storage. Hiding the “Try it” shortcuts is remembered until you close the tab. Neither is sent to us, and you can remove both by clearing this site’s data.
- The demos run in your browser. The theme editor and Boost on the home page work entirely on your device. Boost’s Share button copies text to your clipboard and nowhere else.
- Release information. The Download and What’s New pages get version numbers and release notes from krypton.run, which fetches them from GitHub itself. Reading those pages does not connect your browser to GitHub; downloading an installer does, because the file is hosted there.
- Server logs. Like any web server, the service that hosts krypton.run may record standard request details, such as IP address, browser and time, to keep the site running and secure.
- Downloads and source code are hosted on GitHub. When you follow those links,GitHub’s privacy statementapplies.
Changes and contact
If Krypton or this website starts handling data differently, this page will change first, with a new date at the top. A feature that would share data is added as an optional feature, off by default.
Questions about privacy are welcome. Open an issue onKrypton’s GitHub page. Krypton is free software under the GPL-3.0 licence, so its source code is open for anyone to check.