On July 23 the Tor Project shipped Tor Browser 16.0a9 and the Tails team shipped Tails 7.10. Both are the kind of unglamorous maintenance work that keeps anonymity tools usable while regulators in the UK, Australia, and across the EU spend their time trying to make them illegal. Neither release adds a flashy feature. Both reduce what a normal user leaks. Here is what actually changed in each one before you touch either.
Most people should not install the Tor Browser alpha. Tor Browser 16.0a9 rebases the whole browser from Firefox ESR 140 up to Firefox ESR 153. That rebase pulls in months of Firefox security fixes. Tor Browser is Firefox underneath, and an unpatched browser engine is the most common way people running Tor still get identified. The stable channel gets this hardening later in the year. The alpha is where it gets tested first, and testing means breakage. This build still shows Firefox branding in places it should not, and on Android the address bar currently marks every site as insecure. If you rely on Tor Browser for real protection, run the stable release and let other people find the bugs.
The Android build is now down to a single tracker library, Mozilla's own telemetry, and that telemetry is disabled at runtime by default. Every third-party library baked into an app is code you have to trust and a potential channel for data to leave your device, and Tor stripping its Android build down to one and switching it off is the opposite of how the rest of the mobile industry operates. The team also migrated Android from Google's Material 2 design to Material 3, audited and killed a Mozilla VPN promo that had no business in an anonymity browser, and squeezed roughly three megabytes out of the build with xz compression to stay under Google Play's 100 megabyte limit. Even Tor ships on infrastructure Google controls, and bends its engineering around Google's rules to reach Android users at all.
Tails 7.10 is the release you can act on today. Tails is the amnesic operating system you boot from a USB stick. It routes everything through Tor and forgets everything when you shut it down, so how it shuts down matters. Tails now uses the standard GNOME shutdown process instead of yanking power immediately. It is slower, and it warns you about unsaved documents and open applications before it goes down, then powers off on its own after 60 seconds. The emergency shutdown that kills the machine instantly is still there when you need it. The old fast shutdown risked corrupting data, and for a system people use precisely because their situation is sensitive, losing a file to a botched power-off is a real cost.
They replaced the old GNOME Videos player with Celluloid, and they blocked its network access entirely. A media player has no reason to reach the internet, and a media player that can reach the internet on an anonymity operating system is a hole waiting to leak your real location through a stray connection. So they closed it. If you want to watch something online you open it in Tor Browser or use VLC. You assume every component will try to phone home and you cut the wire before it can. The one catch is that Celluloid does not run on some machines from 2011 or earlier, so very old hardware may hit trouble. Tails 7.10 also ships Tor Browser 15.0.19 and updated firmware for better graphics and Wi-Fi support, and it upgrades automatically from any 7.x release.
Install Tails 7.10 now if you use Tails. It is a stable release that reduces a real risk of data loss and tightens a real leak path. Do not install the Tor Browser 16.0a9 alpha unless you are deliberately testing it and understand it is unfinished. The hardening it carries will reach you in the stable channel later this year, tested and de-bugged, which is the version you actually want protecting you. Alpha builds exist so that the people who depend on the stable build never have to find these problems the hard way.
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FAQ
Should I install the Tor Browser 16.0a9 alpha
No, not for real use. It is an unfinished test build with known bugs, including an Android address bar that marks every site as insecure. Run the stable Tor Browser and wait for these changes to reach it later in 2026.
What does the Firefox 153 rebase actually do for me
Tor Browser is built on Firefox, so rebasing from ESR 140 to ESR 153 pulls in months of Firefox security fixes. An outdated browser engine is a common way Tor users get identified, so staying current on the engine is core to staying anonymous.
Why does Tor cutting to one tracker library matter
Every third-party library in an app is code you have to trust and a possible path for data to leave your device. Tor stripping its Android build to a single telemetry library, disabled by default, means far less baked-in code that could ever report on you.
Is the Tails 7.10 update worth installing
Yes. It is a stable release that makes shutdown safer against data loss and blocks its new video player from the network to close a leak path. It upgrades automatically from any Tails 7.x version.
Why did Tails block network access for its video player
A media player has no reason to reach the internet, and on an anonymity system any stray connection can leak your real location. Blocking it removes that risk. You watch online video in Tor Browser or through VLC instead.