STR: 1. Run Firefox Nightly. 2. Open any page. 3. File -> Print 4. Select "Print To File". On my Debian system, this option is present if the "cups-pdf" package is installed. 5. Select an output file and Print. Expected results: The page is printed to the selected file. Actual results: A progress dialog comes up and goes to completion, but no file appears. A message similar to the following is printed to the console: (/home/botond/programs/firefox-nightly/plugin-container:18974): Gtk-WARNING **: Attempting to store changes into `/home/botond/.local/share/recently-used.xbel', but failed: Failed to create file '/home/botond/.local/share/recently-used.xbel.1YS1QY': Permission denied (/home/botond/programs/firefox-nightly/plugin-container:18974): Gtk-WARNING **: Attempting to set the permissions of `/home/botond/.local/share/recently-used.xbel', but failed: Permission denied Works fine in Firefox Release. Sandboxing issue perhaps?

Fixed in the duplicate bug.