Since I updated to 6.0.1 I cannot download any document from Tor to my desktop. I use the download button at the upper right corner (five icons: full screen-print-download-other-doublearrow) that appear when a pdf document is shown up, but nothing happens. I have to open another browser, copy the url and download from it. Haven't changed parameters from default. I run OSX 10.7.5 on an end 2006 iMac.
It seems ticket #15899 had similar issues with the pdf.js download button, I don't see any errors in the console. It may be worth re-opening this ticket. I see similarly no activity as a result on clicking the download button on pdf.js running on Tails 2.4.
As a work around
Right Click ->
Save Page As (do macs even do right clicks yet?) and
Save Page As should both still work.
Update: This bug has been fixed under #19401 a patch is now applied in Tor Browser 6.0.2