I have this problem with Ubuntu Mate 17.04 x64 kernel 4.10.0-20, Firefox 53.0 x64 as of 5/7/2017.
It was happening in Fedora as well, so then I switched to Ubuntu Mate thinking I'd get away from it but was wrong. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1683653 Title: Ubuntu MATE 17.04 crashes when opening D/L folder from Firefox Status in firefox package in Ubuntu: Confirmed Bug description: Expected: Using Firefox 52.02, when File download finishes, opening "Display the progress of ongoing Downloads" (arrow on Right of address bar), then selecting "Open Containing Folder" icon from Firefox opens Downloads folder on system. What happens: Using Firefox 52.02, when File download finishes, opening "Display the progress of ongoing Downloads" (arrow on Right of address bar), then selecting "Open Containing Folder" icon from Firefox, causes system to hang/crash for period of 2 minutes; (opening menu's, shutdown button, opening any program at all, etc). Sometimes only way to get response from system is shutdown/restart. Steps to reproduce: 1. Start Ubuntu MATE 17.04. 2. Run Firefox. 3. Browse to any site. 4. Download a file from site. 5. Wait until Download arrow indicator next to address bar arrow on Firefox indicates a completed download. 6.Click on arrow next to/on right address bar "Display the progress of ongoing Downloads". 7. Click on icon "Open Containing Folder". 8. Computer will then freeze/hang/crash for a period of at least 2 minutes. Additional notes: 1.Computer is unresponsive at this time, menu's are unresponsive, run application [ALT+ F2] unresponsive, Tabs on Firefox Browser unresponsive, any other programs running unresponsive, unable to close/open any programs. 1a. Note: This unresponsive period may last 2 minutes, or sometimes will only become responsive after killing Firefox process. 2.The date/time applet will still update however. Other applets unresponsive. 3. Terminal can be run [ALT+ CNRL+T]. 4. Terminal will allow "pidof" to be run, to find PID of Firefox. 5. Firefox can be then "killed" by "kill [pid] xxx" via terminal. Computer becomes responsive again. 6. Running Ubuntu Mate 17.04 from a bootable USB results in the same thing/problem happening. 7.Same problem happens with Firefox Version 51. 8. Downgrade to 16.10 on same machine, no problem occurs. 9. No crash error report in "about:crashes" in Firefox built in diagnostics. Computer Specs: X220 Lenevo/i5/16GB RAM/250GB SSD Thank-you. (Please let me know if I have done any of this incorrectly or need any other information. First Bug report!) ~L. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1683653/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp