New Release: Tor Browser 8.0a9

Tor Browser 8.0a9 is now available from the Tor Browser Project page and also from our distribution directory.

This release features important security updates to Firefox.

Tor Browser 8.0a9 is the first alpha release based on Firefox 60 ESR. We rebased all of our patches, updated our toolchains to pick up new requirements like Rust support, and fixed the most important usability issues and broken functionality.

We rely on your feedback to make Tor Browser better for users around the world. Releasing a Tor Browser alpha before each stable release gives us a valuable window of time to learn about and fix bugs before the stable release is used by millions.

New Features

If you are comfortable with Tor Browser, we need your help! This alpha has a lot of new features, including a couple major UX changes, and we want them to be in tip-top shape before the stable release hits this September. Here's a taste of what's new:

  1. Improved Circuit Display:

    We've heard a lot of confusion about how the first guard in the Tor Circuit Display stays the same for months, even if you select "New Identity." This is by design, so now, we're trying to to better communicate that to the user and better manage expectations about both "New Identity" and "New Tor Circuit for this Site."

  2. Onion Indicators:

    We're trying out a new system for indicating .onion sites' relationships to TLS certificates. We mapped all the current padlock states Firefox has for sites' TLS certificates, and from there, we've built a new system for communicating these states when they are related to .onion sites.

  3. New Locales: We added support for da, he, sv-SE, and zh-TW to give users speaking those languages an improved Tor Browser experience. The plan is to add even more locales once we are confident we can handle the additional load and disk space requirements.
  4. New Torbutton Icon: We replaced our old Torbutton icon with a shiny new one. That's the first step in redesigning Tor Browser icons and making them compatible with Firefox's Photon UI. There is more to come in the next alphas.
  5. Full Sandboxing Support for Windows: We are able to provide full content sandboxing support for 64bit Windows bundles now, thanks to the work done by Tom Ritter.

Additionally, we updated a number of components we ship: Tor to, Torbutton to 2.0.1, TorLauncher to, HTTPS-Everywhere to 2018.06.21, and NoScript to Expect more bugs than usual in this alpha.

Known Issues

We already collected a number of unresolved bugs in Tor Browser 8.0a9 and tagged them with our ff60-esr keyword to keep them on our radar. The most important ones are listed below:

  1. Meek is currently broken. We need to update the browser part for make it compatible with ESR60.
  2. On Windows localized builds on first start the about:tor page is not shown, rather a weird XML error is visible.
  3. Maybe related to 2) NoScript does not seem to work properly on Windows builds right now.
  4. We are not done yet with reviewing the network code changes between ESR52 and ESR60. While we don't expect that proxy bypass bugs got introduced between those ESR series, we can't rule it out yet.
  5. We disable Stylo on macOS due to reproducibility issues we need to investigate and fix.
  6. We ran into issues while creating the incremental update files. In order to avoid respinning yet another release candidate and redoing the signing work, we opted into patching our mar-tools locally. For those of you who want to reproduce our builds (please do!) bug 26472 has steps that explain what we did.

Give Feedback and Report Bugs

If you find a bug or have a suggestion for how we could improve these changes, please let us know. There are several ways you can reach us with feedback about this alpha including commenting on this post, emailing us at, or contacting the developers at the tbb-dev mailing list. We track all Tor Browser 8 related issues with the ff60-esr keyword in our bug tracker and are happy with bug reports, there, too. Be sure to include as many of these as possible:

  • Your OS
  • Tor Browser version
  • Step by step of how you got to the issue, so we can reproduce it (e.g. I opened the browser, typed a url, clicked on (i) icon, then my browser crashed)
  • A screenshot of the problem
  • The debug log
  • A descriptive subject line (if you're emailing us)

Thank you for your support!


Note: This alpha release is the first one that gets signed with a new Tor Browser subkey, as the currently used one is about to expire. Its fingerprint is: 1107 75B5 D101 FB36 BC6C  911B EB77 4491 D9FF 06E2. We plan to use it for the stable series, too, once Tor Browser 8 gets released.

The full changelog since Tor Browser 8.0a8 is:

  • All platforms
    • Update Firefox to 60.1.0esr
    • Update Tor to
    • Update Libevent to 2.1.8
    • Update Binutils to 2.26.1
    • Update Torbutton to 2.0.1
      • Bug 26100: Adapt Torbutton to Firefox 60 ESR
      • Bug 26430: New Torbutton icon
      • Bug 24309: Move circuit display to the identity popup
      • Bug 26128: Adapt security slider to the WebExtensions version of NoScript
      • Bug 23247: Show security state of .onions
      • Bug 26129: Show our about:tor page on startup
      • Bug 26235: Hide new unusable items from help menu
      • Bug 26058: Remove workaround for hiding 'sign in to sync' button
      • Bug 20628: Add locales da, he, sv, and zh-TW
      • Translations update
    • Update Tor Launcher to
      • Bug 25750: Update Tor Launcher to make it compatible with Firefox 60 ESR
      • Bug 20890: Increase control port connection timeout
      • Bug 20628: Add more locales to Tor Browser
      • Translations update
    • Update HTTPS Everywhere to 2018.6.21
    • Update NoScript to
    • Bug 25543: Rebase Tor Browser patches for ESR60
    • Bug 23247: Show security state of .onions
    • Bug 26039: Load our preferences that modify extensions
    • Bug 17965: Isolate HPKP and HSTS to URL bar domain
    • Bug 26365: Add potential AltSvc support
    • Bug 26045: Add new MAR signing keys
    • Bug 22564: Hide Firefox Sync
    • Bug 25090: Disable updater telemetry
    • Bug 26127: Make sure Torbutton and Tor Launcher are not treated as legacy extensions
    • Bug 26073: Migrate general.useragent.locale to intl.locale.requested
    • Bug 20628: Make Tor Browser available in da, he, sv-SE, and zh-TW
      • Bug 12927: Include Hebrew translation into Tor Browser
      • Bug 21245: Add danish (da) translation
  • Windows
  • OS X
    • Bug 24052: Backport fix for bug 1412081 for better file:// handling
    • Bug 24136: After loading file:// URLs clicking on links is broken on OS X
    • Bug 24243: Tor Browser only renders HTML for local pages via file://
    • Bug 24263: Tor Browser does not run extension scripts if loaded via about:debugging
    • Bug 24632: Disable snowflake for now until its build is fixed
    • Bug 26438: Remove broken seatbelt profiles
  • Linux
    • Bug 24052: Backport fix for bug 1412081 for better file:// handling
    • Bug 24136: After loading file:// URLs clicking on links is broken on Linux
    • Bug 24243: Tor Browser only renders HTML for local pages via file://
    • Bug 24263: Tor Browser does not run extension scripts if loaded via about:debugging
    • Bug 26153: Update selfrando to be compatible with Firefox 60 ESR
    • Bug 22242: Remove RUNPATH in Linux binaries embedded by selfrando
    • Bug 26354: Set SSE2 support as minimal requirement for Tor Browser 8
  • Build System
    • All
      • Bug 26362: Use old MAR format for first ESR60-based alpha
      • Clean up
    • Windows
      • Bug 26203: Adapt tor-browser-build/tor-browser for Windows
      • Bug 26204: Bundle d3dcompiler_47.dll for Tor Browser 8
      • Bug 26205: Don't build the uninstaller for Windows during Firefox compilation
      • Bug 26206: Ship pthread related dll where needed
      • Bug 26396: Build libwinpthread reproducible
      • Bug 25837: Integrate fxc2 into our build setup for Windows builds
      • Bug 25894: Get a rust cross-compiler for Windows
      • Bug 25554: Bump mingw-w64 version for ESR 60
      • Bug 23561: Fix nsis builds for Windows 64
      • Bug 23231: Remove our STL Wrappers workaround for Windows 64bit
      • Bug 26370: Don't copy msvcr100.dll and libssp-0.dll twice
      • Bug 26476: Work around Tor Browser crashes due to fix for bug 1467041
      • Bug 18287: Use SHA-2 signature for Tor Browser setup executables
    • OS X
      • Bug 24632: Update macOS toolchain for ESR 60
      • Bug 9711: Build our own cctools for macOS cross-compilation
      • Bug 25548: Update macOS SDK for Tor Browser builds to 10.11
      • Bug 26003: Clean up our mozconfig-osx-x86_64 file
      • Bug 26195: Use new cctools in our macosx-toolchain project
      • Bug 25975: Get a rust cross-compiler for macOS
      • Bug 26475: Disable Stylo to make macOS build reproducible
    • Linux
      • Bug 26073: Patch tor-browser-build for transition to ESR 60
      • Bug 25540: Stop building and distributing sandboxed tor browser
      • Bug 25481: Rust support for tor-browser and tor

I also had this issue a couple weeks ago. I remember seeing a white page with the same message and a PGP code. Don't recall all the details. Switched to latest stable and didn't see it on there.


July 04, 2018


Please help me about this problem.

Tor failed to establish a Tor network connection.

Loading authority certificates failed( clock skew - 6457 in microdesc flavor consensus from CONSENSUS -?).

Tor needs an accurate clock on your computer to work properly. It seems that's not the case right now for you, which is why it is breaking. So, to solve this make sure to adjust the current time on your machine accordingly.


July 24, 2018


I'm unsure about the functionality of the security slider in TB version 8.0a9. My security slider has been set to "safest" since browser installation. JavaScript seems to be enabled at that setting. Sites that should have been broken with JavaScript disabled were not. After I used about:config to disable JavaScript, sites that should be broken with security slider set to "safest" were broken. So, I think there may be a problem.


July 28, 2018


When I start 8.0a9, the "Welcome to Tor Browser" page is blank white, and many tabs are not enabled. Then, when I click on "New Identity" in the tor onion button, the browser reopens with the correct Welcome page. From that point on, browser navigation seems normal. Thank you.


July 31, 2018


8.0a9 has started a new dysfunctional behavior. It repeatedly reloads itself. I've included "reload" in the toolbar and, when the browser is convulsing, I can drop the toolbar menu down where it shows "stop" instead of "reload". Hitting "stop" just right to shut off this browser cycling is tricky. That fix usually doesn't last long. Sometimes, a reinstall will smooth things out for a while. But then ... e-yup, right back to the same shenanigans. I think 8.0a9 turns out to be quite rascally, and you have my sympathy ... NOT trying to sound condescending, either. Best wishes to you all at tor project, and thank you for your dedication and help.


September 05, 2018


New update just fucking broke my browser.

"The proxy server is refusing connections"

Should was installing old to let it work again.


September 09, 2018


cant download with internet download maneger its critical to add its add on to new version other download do not work with all websites


December 17, 2018


Did not see a real dark theme.
I switch dark theme on, but the only thing that changes are the window tabs above.
Not the content of the website;
still appears in white.

What to do?!


October 24, 2019


The program can't start because api-ms-win-crt-convert-l1-1-0.dll is missing from your computer. Try reinstalling... which doesn't work.