User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID: 20170824053838 Steps to reproduce: Open the file explorer through Firefox (e.g., while uploading an attachment). Press spacebar on any file. (macOS Sierra 10.12.6) Actual results: Firefox crashed. Expected results: A preview of the file should have appeared.

(In reply to YF (Yang) from comment #1) > https://developer.mozilla.org/en-US/docs/ > How_to_get_a_stacktrace_for_a_bug_report Apologies - this is my first bug report! Crash IDs: bp-151a6c8a-c696-40d4-9431-6796f1171005 bp-da209d03-15f0-43f2-882a-8b6010171005 bp-4c452d01-6406-4d7a-b213-540ae1171005 All three times it happened once I pressed an arrow key in the file explorer after Quick Look-ing something to go to the next file.

Could you try to reproduce this with the Firefox Beta and Firefox Nightly? Is it still crashing? You can download both versions here: https://www.mozilla.org/en-US/firefox/channel/desktop/

https://crash-stats.mozilla.com/report/index/151a6c8a-c696-40d4-9431-6796f1171005#tab-bugzilla Looks like there is a secret bug that is dealing with this crash.

(In reply to Stephen A Pohl [:spohl] from comment #3) > Could you try to reproduce this with the Firefox Beta and Firefox Nightly? > Is it still crashing? You can download both versions here: > https://www.mozilla.org/en-US/firefox/channel/desktop/ Fixed in both - I'm upgrading! (In reply to YF (Yang) from comment #4) > https://crash-stats.mozilla.com/report/index/151a6c8a-c696-40d4-9431- > 6796f1171005#tab-bugzilla > > Looks like there is a secret bug that is dealing with this crash. Interesting. I'm not authorized to access it or resolve this as a duplicate of that one so could one of you please do that, thanks.

Thank you! This is believed to be fixed by bug 1324892.