From /r/TOR:
"Old news. This was fixed in 6.0.5.
https://blog.torproject.org/blog/tor-browser-605-released
Interesting note: The author is part of the rotor browser fork that is going no where so far. Doesn't look like the reported issue has been fixed there. In fact, no commits since before this blog post."
https://www.reddit.com/r/TOR/comments/53u1cd/tor_browser_exp...