Firefox no longer supports transparent windows because it made them do
extra preprocessing on a file to restore the drop shadow when the
Developer Edition theme was active:
https://bugzilla.mozilla.org/show_bug.cgi?id=1162649
- Open in current window if one is already open
- Use a button instead of a label
- Don't show button if citation item is not linked to a Zotero item
This doesn't currently work if the Zotero pane has never been opened in the given window, because ZoteroPane.selectItem() appears to fail in that circumstance. This needs to be fixed.
