After three months of testing, the browser bundle commonly used to access Bitcoin “dark net market” sites has been updated to a stable 5.0.
The update completely re-based the Tor Browser bundle on top of Firefox 38.2.0 ESR from 31.8.0 ESR. Due to the massive re-base, Firefox security updates, HTML5 video support, and many other browser improvements are included in the release. The update also includes new bundle specific features, including background updates and security defenses against keystroke fingerprinting and other timing-based fingerprinting.
As expected with such an ambitious update, it’s not without issues. Due to the Tor network architecture, it’s generally recommended users update to the latest version to limit identifiers which may single out users. Most new bugs and features have simple workarounds which allow most users to update without worry.
Users who set the “high” security setting will notice the revamped Firefox options menu is entirely unresponsive. As a workaround, users may restore the old menu interface by going to “about:config” in the address bar, double clicking