Privacy Policy
Last updated: 2026-04-24
This policy covers the matata download helper browser extension and the matata native application. The extension and the app are developed by the same author and always function as a pair.
What data the extension sees
The extension runs inside your browser. The set of data it can observe is limited to what the following Chrome / WebExtension permissions require:
| Permission | Why it’s declared |
|---|---|
downloads |
Read URL, filename, and referrer of downloads you trigger, so the matata app can take them over. |
cookies |
Read cookies for the origin of a download so authenticated files (session-gated downloads, logged-in content) still work after matata fetches them. |
nativeMessaging |
Communicate with the locally-installed matata app via the Native Messaging channel. |
storage |
Persist your own settings (extension filter, minimum size, clipboard-watch toggle, etc.) between browser sessions. |
webRequest |
Observe — not block — .m3u8 and .mpd requests so the popup can list streams you might want to grab. |
tabs |
Identify which tab is active so the detected-streams list is filtered to that tab. |
host_permissions: <all_urls> |
The three permissions above need to work on arbitrary origins because you can download from arbitrary origins. |
What data leaves your computer
None of it goes to a server we control. There is no analytics, no telemetry, no crash reporting, no account, and no login.
The only place data goes is:
-
To the locally-installed matata app (via Native Messaging, a local stdio pipe — nothing touches the network). The message contains the URL, the user-agent, and optionally a referer and cookies for that origin, so matata can issue the correct HTTP request itself.
-
To the server hosting your download. This is a normal HTTP request from your own machine, the same one your browser would have made — just performed by matata with better segmentation and resume.
What data the app stores on disk
- Downloaded files go wherever you tell them to.
- A
.mtpartsidecar next to each in-progress download (body + metadata used for resume). - Your preferences under
HKEY_CURRENT_USER\Software\matata\Gui(column widths, window placement, default output folder, bandwidth cap, etc.). - A plain-text queue state file if you explicitly opt in via
--queue FILEon the CLI.
What we never do
- We never upload the list of URLs you download, the files themselves, your cookies, or anything derived from them.
- We never phone home to check for updates unless you explicitly run
matata --check-update(and even then, only against a URL you control). - We never install, launch, or update any other software.
- We never sell, share, or transfer data to third parties.
Open-source verification
The extension and app are open source. You can audit every line at
github.com/morris2016/matata-idm.
The build is reproducible: build.bat produces exactly the four
binaries shipped in the installer.
Contact
Issues, questions, or data-removal requests: github.com/morris2016/matata-idm/issues or by email at siagmoo26@gmail.com.
Changes to this policy
If this policy changes, the Last updated date above will change with
it. The canonical version lives at the URL you’re reading now.