diff --git a/pywb/static/query.js b/pywb/static/query.js
index cae02cae7..fd0a04502 100644
--- a/pywb/static/query.js
+++ b/pywb/static/query.js
@@ -57,14 +57,6 @@ function RenderCalendar(init) {
   };
   // regex for extracting the filter constraints and filter mods to human explanation
   this.filterRE = /filter([^a-z]+)([a-z]+):(.+)/i;
-  this.filterMods = {
-    '=': 'Contains',
-    '==': 'Matches Exactly',
-    '=~': 'Matches Regex',
-    '=!': 'Does Not Contains',
-    '=!=': 'Is Not',
-    '=!~': 'Does Not Begins With'
-  };
   this.text = init.text;
   this.versionString = null;
 }
@@ -433,7 +425,6 @@ RenderCalendar.prototype.createContainers = function() {
     return;
   }
   // create the advanced results query info DOM structure
-  var forString = ' for ';
   var forElems;
 
   if (this.queryInfo.searchParams.matchType) {
@@ -503,7 +494,7 @@ RenderCalendar.prototype.createContainers = function() {
         {
           tag: 'p',
           className: 'text-center mb-0 mt-1',
-          innerText: 'Filtering by'
+          innerText: filteringBy
         },
         {
           tag: 'ul',
@@ -950,7 +941,7 @@ RenderCalendar.prototype.niceFilterDisplay = function() {
       filterList.push({
         tag: 'li',
         className: 'list-group-item',
-        innerText: match[2] + ' ' + this.filterMods[match[1]] + ' ' + match[3]
+        innerText: match[2] + ' ' + filterMods[match[1]] + ' "' + match[3] + '"'
       });
     }
   }
diff --git a/pywb/static/search.js b/pywb/static/search.js
index dd189bb9a..eafa0023d 100644
--- a/pywb/static/search.js
+++ b/pywb/static/search.js
@@ -1,14 +1,6 @@
 var dtRE = /^\d{4,14}$/;
 var didSetWasValidated = false;
 var showBadDateTimeClass = 'show-optional-bad-input';
-var filterMods = {
-  '=': 'Contains',
-  '==': 'Matches Exactly',
-  '=~': 'Matches Regex',
-  '=!': 'Does Not Contains',
-  '=!=': 'Is Not',
-  '=!~': 'Does Not Begins With'
-};
 
 var elemIds = {
   filtering: {
@@ -65,7 +57,7 @@ function makeCheckDateRangeChecker(dtInputId, dtBadNotice) {
 
 function createAndAddNoFilter(filterList) {
   var nothing = document.createElement('li');
-  nothing.innerText = 'No Filter';
+  nothing.innerText = noFilter;
   nothing.id = elemIds.filtering.nothing;
   filterList.appendChild(nothing);
 }
@@ -78,19 +70,24 @@ function addFilter(event) {
   if (!expr) return;
   var filterExpr = 'filter' + modifier + by + ':' + expr;
   var filterList = document.getElementById(elemIds.filtering.list);
+  var previousFilters = filterList.children;
+  for (var i = 0; i < previousFilters.length; ++i) {
+    var filterData = previousFilters[i].dataset;
+    if (filterData && filterData.filter && filterData.filter == filterExpr) return;
+  }
   var filterNothing = document.getElementById(elemIds.filtering.nothing);
   if (filterNothing) {
     filterList.removeChild(filterNothing);
   }
   var li = document.createElement('li');
   li.innerText =
-    'By ' +
     by[0].toUpperCase() +
     by.substr(1) +
     ' ' +
     filterMods[modifier] +
-    ' ' +
-    expr;
+    ' "' +
+    expr +
+    '"';
   li.dataset.filter = filterExpr;
   var nukeButton = document.createElement('button');
   nukeButton.type = 'button';
@@ -110,6 +107,7 @@ function addFilter(event) {
   };
   li.appendChild(nukeButton);
   filterList.appendChild(li);
+  return true;
 }
 
 function clearFilters(event) {
@@ -166,6 +164,17 @@ function validateFields(form) {
   }
 }
 
+function submitForm(event, form, searchURLInput) {
+  event.preventDefault();
+  event.stopPropagation();
+  var url = searchURLInput.value;
+  if (!url) {
+    validateFields(form);
+    return;
+  }
+  performQuery(url);
+}
+
 $(document).ready(function() {
   $('[data-toggle="tooltip"]').tooltip({
     container: 'body',
@@ -184,16 +193,18 @@ $(document).ready(function() {
   var searchURLInput = document.getElementById(elemIds.url);
   var form = document.getElementById(elemIds.form);
   form.addEventListener('submit', function(event) {
-    event.preventDefault();
-    event.stopPropagation();
-    var url = searchURLInput.value;
-    if (!url) {
-      validateFields(form);
-      return;
-    }
-    performQuery(url);
+    submitForm(event, form, searchURLInput);
   });
   document.getElementById(elemIds.advancedOptions).onclick = function() {
     validateFields(form);
   }
+  var filteringExpression = document.getElementById(elemIds.filtering.expression);
+  filteringExpression.addEventListener("keypress", function(event) {
+    if (event.key === "Enter") {
+      event.preventDefault();
+      if (! addFilter()) {
+        submitForm(event, form, searchURLInput);
+      }
+    }
+  });
 });
diff --git a/pywb/templates/query.html b/pywb/templates/query.html
index d9482836e..e60614aed 100644
--- a/pywb/templates/query.html
+++ b/pywb/templates/query.html
@@ -71,6 +71,16 @@ <h4 class="display-4 text-center text-sm-left p-0">{{ _('Search Results') }}</h4
       },
     };
 
+  var filterMods = {
+    '=': "{{ _('Contains') }}",
+    '==': "{{ _('Matches Exactly') }}",
+    '=~': "{{ _('Matches Regex') }}",
+    '=!': "{{ _('Does Not Contain') }}",
+    '=!=': "{{ _('Is Not') }}",
+    '=!~': "{{ _('Does Not Begin With') }}"
+  };
+  var filteringBy = "{{ _('Filtering by') }}";
+  var forString = " {{ _('for') }} ";
   var renderCal = new RenderCalendar({ prefix: "{{ prefix }}", staticPrefix: "{{ static_prefix }}", text: text });
   renderCal.init();
 </script>
diff --git a/pywb/templates/search.html b/pywb/templates/search.html
index e5b0ecba6..a781fb004 100644
--- a/pywb/templates/search.html
+++ b/pywb/templates/search.html
@@ -3,8 +3,18 @@
 {% block head %}
 {{ super() }}
 <script>
-// TODO: cleanup
-window.wb_prefix = "{{ wb_prefix }}";
+  var filterMods = {
+    '=': "{{ _('Contains') }}",
+    '==': "{{ _('Matches Exactly') }}",
+    '=~': "{{ _('Matches Regex') }}",
+    '=!': "{{ _('Does Not Contain') }}",
+    '=!=': "{{ _('Is Not') }}",
+    '=!~': "{{ _('Does Not Begin With') }}"
+  };
+  var noFilter = "{{ _('No Filter') }}";
+
+  // TODO: cleanup
+  window.wb_prefix = "{{ wb_prefix }}";
 </script>
 <script src="{{ static_prefix }}/search.js"></script>
 {% endblock %}
@@ -24,14 +34,14 @@ <h4 class="display-4">
                 <label for="search-url" class="lead" aria-label="Search For Col">
                     {% set coll_title = metadata.title if metadata and metadata.title else coll %}
                     {% autoescape false %}
-                    {% trans %}Search the {{ coll_title }} collection by url: {% endtrans %}
+                    {% trans %}Search the {{ coll_title }} collection by url:{% endtrans %}
                     {% endautoescape %}
                 </label>
                 <input aria-label="url" aria-required="true" class="form-control form-control-lg" id="search-url"
                        name="search" placeholder="{{ _('Enter a URL to search for') }}"
                        title="{{ _('Enter a URL to search for') }}" type="search" required/>
                 <div class="invalid-feedback">
-                    {% trans %}'Please enter a URL{% endtrans %}
+                    {% trans %}Please enter a URL{% endtrans %}
                 </div>
             </div>
         </div>
@@ -131,7 +141,7 @@ <h4 class="display-4">
                                 <option value="=~">{% trans %}Matches Regex{% endtrans %}</option>
                                 <option value="=!">{% trans %}Does Not Contain{% endtrans %}</option>
                                 <option value="=!=">{% trans %}Is Not{% endtrans %}</option>
-                                <option value="=!~">{% trans %}Does Not Begins With{% endtrans %}</option>
+                                <option value="=!~">{% trans %}Does Not Begin With{% endtrans %}</option>
                             </select>
                         </div>
                         <div class="row">