this fixes #401

src/js/element-picker.js

@@ -679,6 +679,7 @@ var startPicker = function(details) {
 
     var pickerStyle = document.createElement('style');
     pickerStyle.setAttribute('scoped', '');
+    pickerStyle.style.setProperty('display', 'none', 'important');
     pickerStyle.textContent = [
         '#µBlock, #µBlock * {',
             'background: transparent;',
@@ -695,23 +696,25 @@ var startPicker = function(details) {
             'margin: 0;',
             'max-width: none;',
             'min-height: 0;',
+            'min-width: 0;',
             'outline: 0;',
             'overflow: visible;',
             'padding: 0;',
             'text-transform: none;',
             'vertical-align: baseline;',
+            'width: auto;',
             'z-index: auto;',
         '}',
         '#µBlock {',
             'position: absolute;',
             'top: 0;',
             'left: 0;',
         '}',
-        '#µBlock ul, #µBlock li {',
+        '#µBlock ul, #µBlock li, #µBlock div {',
             'display: block;',
         '}',
         '#µBlock button {',
-            'border: 1px solid #aaa;',
+            'border: 1px solid #aaa !important;',
             'padding: 6px 8px 4px 8px;',
             'box-sizing: border-box;',
             'box-shadow: none;',
@@ -755,14 +758,14 @@ var startPicker = function(details) {
             'fill: rgba(255,0,0,0.25);',
         '}',
         '#µBlock > div {',
-            'padding: 4px;',
+            'background-color: rgba(255,255,255,0.9);',
+            'bottom: 4px;',
             'display: none;',
+            'font: 12px sans-serif;',
+            'padding: 4px;',
             'position: fixed;',
             'right: 4px;',
-            'bottom: 4px;',
             'width: 30em;',
-            'font: 12px sans-serif;',
-            'background-color: rgba(255,255,255,0.9);',
             'z-index: 5999999999;',
         '}',
         '#µBlock.paused > div {',