Tor Browser 15.0 released

Version 15.0
of the Tor
Browser has been released:

This is our first stable release based on Firefox ESR 140,
incorporating a year's worth of changes that have been shipped
upstream in Firefox. As part of this process, we've also completed our
annual ESR transition audit, where we reviewed and addressed around
200 Bugzilla issues for changes in Firefox that may negatively affect
the privacy and security of Tor Browser users. Our final reports from
this audit are now available in the tor-browser-spec
repository on our GitLab instance.

This release inherits the vertical tabs feature, unified search
button, as well as other new features and usability improvements in
Firefox that have passed the Tor Project's audit.