Based on the Mozilla Firefox 31.7.0 ESR web browser

May 15, 2015 20:30 GMT  ·  By

The Tor Project announced the release of the Tor Browser 4.5.1 for all those who want to stay anonymous online. The new maintenance release is based on Mozilla Firefox 31.7.0 ESR, and it is available for GNU/Linux, Mac OS X, and Microsoft Windows platforms.

According to the release notes, TOR Browser 4.5.1 comes with some updated core components, such as Tor Launcher 0.2.7.5, meek 0.18, Torbutton 1.9.2.3, as well as numerous bug fixes and translation updates.

"The most notable change is that we have slightly relaxed the first party isolation privacy property, due to issues encountered on several file hosting sites as well as other sites that host content on multiple subdomains," says Mike Perry in the blog announcement.

Among some of the most interesting fixes in this release, we can mention better support for Ubuntu 14.04 LXC hosts via the LXC_EXECUTE=lxc-execute environment variable, and a startup issue with the meek pluggable transport under Windows 7.

A couple of build errors that occurred during Mozilla Tryserver builds have been addressed, downloading and displaying of PDF documents now works flawlessly, and a  file descriptor leak was patched in the built-in updater.

Last but not least, Tor Browser 4.5.1 disables the NoScript's ClearClick protection, and isolates by base (top-level) domain name instead of by fully qualified domain name (FQDN). Download Tor Browser 4.5.1 for Linux, Mac OS X, and Microsoft Windows operating systems right now from Softpedia.