Printing to PDF with Tor Browser does not work anymore

to reproduce :

ask Tor Browser to print a web page
select ‘print to a pdf file’
save the file in ‘/home/amnesia/Tor Browser’ or ‘/home/amnesia/Persistent/Tor Browser’
Print

as a result, the file does not exist anywhere.
apparently there was no issue prior Tails 3.3.

this issue was reported to us by an anonymous user, but others have reported it on reddit (https://www.reddit.com/r/tails/comments/7hnvd7/cant_print_to_pdf_in_tails_33/) and I could reproduce it myself.

I did not see any apparmor denials in my logs.

Tor ticket: https://trac.torproject.org/projects/tor/ticket/23970

Related issues

Is duplicate of #15024 (closed)

Original created by @goupille on 15066 (Redmine)

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