"GLib-GObject-CRITICAL" error - Linux

edited December 1, 2017
I am running 14.04, Firefox v56 (I don't want 57 right now).

When I start the program, a terminal pops up and then Zotero runs. However the terminal keeps putting out the following error:

(zotero:20549): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed

Now, after repeating the above code several times I get the following and the error code above has stopped:

1512160280252 addons.update-checker WARN Update manifest for zoteroOpenOfficeIntegration@zotero.org did not contain an updates property

Any way to correct this?
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