Fix the index search clear button appearance on Firefox.

css/style.css

@@ -383,7 +383,10 @@ a[href="javascript:;"] {
   color: gray;
   margin-left: -1.25em;
 }
+<% if (type === 'crx') { %>
+/* ``::-webkit-*'' selectors break selector lists on Firefox. */
 #index-search::-webkit-search-cancel-button,
+<% } %>
 #index-search:not([data-searching]) + #index-search-clear {
   display: none;
 }

src/General/Index.coffee

@@ -332,7 +332,12 @@ Index =
     if Index.isSearching = !!Index.searchInput.value.trim()
       Index.searchInput.dataset.searching = 1
     else
+      <% if (type === 'userscript') { %>
+      # XXX https://github.com/greasemonkey/greasemonkey/issues/1571
+      Index.searchInput.removeAttribute 'data-searching'
+      <% } else { %>
       delete Index.searchInput.dataset.searching
+      <% } %>
     Index.sort()
     Index.buildIndex()
   querySearch: (query) ->