diff --git a/chrome/content/zotero/attachLink.xhtml b/chrome/content/zotero/attachLink.xhtml
index 3a5b7877ec..bc1382fae9 100644
--- a/chrome/content/zotero/attachLink.xhtml
+++ b/chrome/content/zotero/attachLink.xhtml
@@ -22,11 +22,11 @@
 		</hbox>
 		<hbox align="center">
 			<label id="zotero-attach-uri-label-input" value="&zotero.attachLink.label.link;" control="zotero-attach-uri-input"></label>
-			<html:input type="text" id="zotero-attach-uri-input" style="-moz-box-flex: 1"/>
+			<html:input type="text" id="zotero-attach-uri-input" style="flex: 1"/>
 		</hbox>
 		<hbox align="center">
 			<label id="zotero-attach-uri-label-title" value="&zotero.attachLink.label.title;" control="zotero-attach-uri-title"></label>
-			<html:input type="text" id="zotero-attach-uri-title" style="-moz-box-flex: 1" placeholder="&zotero.general.optional;"/>
+			<html:input type="text" id="zotero-attach-uri-title" style="flex: 1" placeholder="&zotero.general.optional;"/>
 		</hbox>
 	</vbox>
 </dialog>