User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20150508094354 Steps to reproduce: - update from FF 37 to 38 - Preferences entry is gone from the Firefox application menu - cmd+, shortcut to open preferences is not working either --> it seems the only way right now to open preferences is about:preferences via address field Actual results: - preferences are not accessible via the usual way Expected results: - there should be still an entry in the application menu - cmd+, shortcut to open preferences should still work

Could this be bug 1151345?

Yes, this might be a duplicate. Plus the issue that the keyboard shortcuts are not working - but this might be due the missing menu entries.