Tor Browser 7.5 is not working on Windows Vista 64bit

We have some users on the blog complaining about Tor Browser 7.5 being broken on Windows Vista 64bit. See, for instance:https://blog.torproject.org/comment/273815#comment-273815

The error ("TypeError: frameLoader.tabParent is null") might indicate that our enabled sandboxing is breaking things for them.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information