Created attachment 8814043 [details] attach.png User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 Build ID: 20161121093909 Steps to reproduce: 1. Create issue in Atlassian Jira 2. Try to attach file. 3. Drag and drop file And I do not remember, in which services also used drag and drop attachments for reproducing not only in Jira. Actual results: Attached too much files (about 20) Expected results: Attached 1 file
Also it not reproduced in 51 and 53 Firefox. For 52 not checked.
There's a new version of https://marketplace.atlassian.com/plugins/com.atlassian.jira.plugins.jira-dnd-attachment-plugin/versions that fixed this problem for me. See https://ecosystem.atlassian.net/browse/JDDAP-127
This seems like an issue with this website, not with Firefox.