update to 52.0

14 files changed, 246 insertions, 282 deletions

diff --git a/arc-firefox-theme/chrome/global/aboutReaderControls.css b/arc-firefox-theme/chrome/global/aboutReaderControls.css
index 09f8bdc..a624901 100644
--- a/arc-firefox-theme/chrome/global/aboutReaderControls.css
+++ b/arc-firefox-theme/chrome/global/aboutReaderControls.css
@@ -82,6 +82,7 @@
   background-color: #fbfbfb;
   -moz-user-select: none;
   border-right: 1px solid #b5b5b5;
+  z-index: 1;
 }
 
 .button {
diff --git a/arc-firefox-theme/chrome/global/button.css b/arc-firefox-theme/chrome/global/button.css
index 8b5f331..6202475 100644
--- a/arc-firefox-theme/chrome/global/button.css
+++ b/arc-firefox-theme/chrome/global/button.css
@@ -150,199 +150,3 @@ button[type="disclosure"] {
 button[type="disclosure"][open="true"] {
   list-style-image: url("chrome://global/skin/tree/twisty-open.png"); 
 }
-
-/*
- * GNOME Stock Icon Styles
- */
-
-button[icon="accept"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-ok?size=button");
-}
-
-button[icon="accept"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-ok?size=button&state=disabled");
-}
-
-button[icon="cancel"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-cancel?size=button");
-}
-
-button[icon="cancel"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-cancel?size=button&state=disabled");
-}
-
-button[icon="help"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-help?size=button");
-}
-
-button[icon="help"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-help?size=button&state=disabled");
-}
-
-button[icon="open"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-open?size=button");
-}
-
-button[icon="open"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-open?size=button&state=disabled");
-}
-
-button[icon="save"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-save?size=button");
-}
-
-button[icon="save"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-save?size=button&state=disabled");
-}
-
-button[icon="find"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-find?size=button");
-}
-
-button[icon="find"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-find?size=button&state=disabled");
-}
-
-button[icon="clear"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-clear?size=button");
-}
-
-button[icon="clear"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-clear?size=button&state=disabled");
-}
-
-button[icon="yes"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-yes?size=button");
-}
-
-button[icon="yes"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-yes?size=button&state=disabled");
-}
-
-button[icon="no"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-no?size=button");
-}
-
-button[icon="no"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-no?size=button&state=disabled");
-}
-
-button[icon="apply"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-apply?size=button");
-}
-
-button[icon="apply"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-apply?size=button&state=disabled");
-}
-
-button[icon="close"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-close?size=button");
-}
-
-button[icon="close"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-close?size=button&state=disabled");
-}
-
-button[icon="print"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-print?size=button");
-}
-
-button[icon="print"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-print?size=button&state=disabled");
-}
-
-button[icon="add"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-add?size=button");
-}
-
-button[icon="add"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-add?size=button&state=disabled");
-}
-
-button[icon="remove"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-remove?size=button");
-}
-
-button[icon="remove"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-remove?size=button&state=disabled");
-}
-
-button[icon="refresh"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-refresh?size=button");
-}
-
-button[icon="refresh"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-refresh?size=button&state=disabled");
-}
-
-button[icon="revert"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-revert-to-saved?size=button");
-}
-
-button[icon="revert"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-revert-to-saved?size=button&state=disabled");
-}
-
-button[icon="go-forward"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=button");
-}
-
-button[icon="go-forward"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=button&state=disabled");
-}
-
-button[icon="go-forward"]:-moz-locale-dir(rtl) .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=button");
-}
-
-button[icon="go-forward"]:-moz-locale-dir(rtl)[disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=button&state=disabled");
-}
-
-button[icon="go-back"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-back-ltr?size=button");
-}
-
-button[icon="go-back"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-back-ltr?size=button&state=disabled");
-}
-
-button[icon="go-back"]:-moz-locale-dir(rtl) .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-back-rtl?size=button");
-}
-
-button[icon="go-back"]:-moz-locale-dir(rtl)[disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-go-back-rtl?size=button&state=disabled");
-}
-
-button[icon="properties"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-properties?size=button");
-}
-
-button[icon="properties"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-properties?size=button&state=disabled");
-}
-
-button[icon="select-font"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-select-font?size=button");
-}
-
-button[icon="select-font"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-select-font?size=button&state=disabled");
-}
-
-button[icon="select-color"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-color-picker?size=button");
-}
-
-button[icon="select-color"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-color-picker?size=button&state=disabled");
-}
-
-button[icon="network"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-network?size=button");
-}
-
-button[icon="network"][disabled="true"] .button-icon {
-  list-style-image: url("moz-icon://stock/gtk-network?size=button&state=disabled");
-}
diff --git a/arc-firefox-theme/chrome/global/global.css b/arc-firefox-theme/chrome/global/global.css
index 709936e..1f9e7e4 100644
--- a/arc-firefox-theme/chrome/global/global.css
+++ b/arc-firefox-theme/chrome/global/global.css
@@ -35,10 +35,10 @@ toolbar[type="menubar"]:not([autohide="true"]):not(:-moz-lwtheme):-moz-system-me
 
 /* ::::: Variables ::::: */
 :root {
-  --panel-arrowcontent-padding: 10px;
-  --panel-arrowcontent-background: -moz-field;
-  --panel-arrowcontent-color: -moz-fieldText;
-  --panel-arrowcontent-border-color: ThreeDShadow;
+  --arrowpanel-padding: 10px;
+  --arrowpanel-background: -moz-field;
+  --arrowpanel-color: -moz-fieldText;
+  --arrowpanel-border-color: ThreeDShadow;
 }
 
 /* ::::: root elements ::::: */
diff --git a/arc-firefox-theme/chrome/global/icons/input-clear.svg b/arc-firefox-theme/chrome/global/icons/input-clear.svg
new file mode 100644
index 0000000..0abaaf9
--- /dev/null
+++ b/arc-firefox-theme/chrome/global/icons/input-clear.svg
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+ <!-- This Source Code Form is subject to the terms of the Mozilla Public
+    - License, v. 2.0. If a copy of the MPL was not distributed with this
+    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 12 12">
+  <style>
+    .st0 {
+      fill: #858585;
+    }
+    .st1 {
+      fill: #FFFFFF;
+    }
+  </style>
+  <circle id="Combined-Shape" class="st0" cx="6" cy="6" r="6"/>
+  <polygon id="Close_Button_-_Normal-path" class="st1" points="9,8.1 8.1,9 6,6.9 3.9,9 3,8.1 5.1,6 3,3.9 3.9,3 6,5.1 8.1,3 9,3.9 6.9,6"/>
+</svg>
diff --git a/arc-firefox-theme/chrome/global/in-content/common.css b/arc-firefox-theme/chrome/global/in-content/common.css
index 6a3c188..05c91b4 100644
--- a/arc-firefox-theme/chrome/global/in-content/common.css
+++ b/arc-firefox-theme/chrome/global/in-content/common.css
@@ -73,11 +73,16 @@ xul|caption {
   margin: 0;
 }
 
+html|h2,
 xul|caption > xul|checkbox,
 xul|caption > xul|label {
   font-size: 1.3rem;
   font-weight: bold;
   line-height: 22px;
+}
+
+xul|caption > xul|checkbox,
+xul|caption > xul|label {
   margin: 0 !important;
 }
 
@@ -567,6 +572,11 @@ xul|richlistitem > xul|*.checkbox-check {
   margin: 3px 6px;
 }
 
+html|*.toggle-container-with-text {
+  display: flex;
+  align-items: center;
+}
+
 xul|radio {
   margin-inline-start: 0;
 }
diff --git a/arc-firefox-theme/chrome/global/menu.css b/arc-firefox-theme/chrome/global/menu.css
index ea73d9c..06e3b21 100644
--- a/arc-firefox-theme/chrome/global/menu.css
+++ b/arc-firefox-theme/chrome/global/menu.css
@@ -36,7 +36,8 @@ menuitem[_moz-menuactive="true"],
 
 menu[disabled="true"],
 menuitem[disabled="true"],
-.splitmenu-menuitem[disabled="true"] {
+.splitmenu-menuitem[disabled="true"],
+menucaption[disabled="true"] {
   color: GrayText;
 }
 
@@ -184,14 +185,6 @@ menuitem[type="radio"] {
 
 menuseparator {
   -moz-appearance: menuseparator;
-  margin: 2px 0;
-  border-top: 1px solid ThreeDShadow;
-  border-bottom: 1px solid ThreeDHighlight;
-}
-
-menulist > menupopup > menuseparator {
-  border-top: 1px solid #000000;
-  border-bottom: none;
 }
 
 /* ::::: autocomplete ::::: */
@@ -200,11 +193,3 @@ menulist > menupopup > menuseparator {
   max-width: none !important;
   font: message-box;
 }
-
-/* ::::: tree column picker ::::: */
-
-.treecell-popupcell-menu {
-  margin-inline-start: -2px;
-  list-style-image: url("chrome://global/skin/columnselect.gif");
-  -moz-image-region: auto;
-}
diff --git a/arc-firefox-theme/chrome/global/narrate.css b/arc-firefox-theme/chrome/global/narrate.css
index 3aa8a8a..8a44e78 100644
--- a/arc-firefox-theme/chrome/global/narrate.css
+++ b/arc-firefox-theme/chrome/global/narrate.css
@@ -1,3 +1,8 @@
+.narrating {
+  position: relative;
+  z-index: 1;
+}
+
 body.light .narrating {
   background-color: #ffc;
 }
@@ -9,3 +14,33 @@ body.sepia .narrating {
 body.dark .narrating {
   background-color: #242424;
 }
+
+.narrate-word-highlight {
+  position: absolute;
+  display: none;
+  transform: translate(-50%, calc(-50% - 2px));
+  z-index: -1;
+  border-bottom-style: solid;
+  border-bottom-width: 7px;
+  transition: left 0.1s ease;
+}
+
+.narrating > .narrate-word-highlight {
+  display: inline-block;
+}
+
+.narrate-word-highlight.newline {
+  transition: none;
+}
+
+body.light .narrate-word-highlight {
+  border-bottom-color: #ffe087;
+}
+
+body.sepia .narrate-word-highlight {
+  border-bottom-color: #bdb5a5;
+}
+
+body.dark .narrate-word-highlight {
+  border-bottom-color: #6f6f6f;
+}
diff --git a/arc-firefox-theme/chrome/global/notification.css b/arc-firefox-theme/chrome/global/notification.css
index 48613f5..2e57051 100644
--- a/arc-firefox-theme/chrome/global/notification.css
+++ b/arc-firefox-theme/chrome/global/notification.css
@@ -14,6 +14,16 @@ notification[type="info"] {
   color: -moz-DialogText;
   background-color: -moz-Dialog;
   -moz-appearance: none;
+  border-top: 1px solid ThreeDShadow;
+  border-bottom: 1px solid ThreeDShadow;
+}
+
+notificationbox[notificationside="top"] > notification[type="info"] {
+  border-top-style: none;
+}
+
+notificationbox[notificationside="bottom"] > notification[type="info"] {
+  border-bottom-style: none;
 }
 
 notification[type="critical"] {
diff --git a/arc-firefox-theme/chrome/global/popup.css b/arc-firefox-theme/chrome/global/popup.css
index 80256df..d435fca 100644
--- a/arc-firefox-theme/chrome/global/popup.css
+++ b/arc-firefox-theme/chrome/global/popup.css
@@ -32,10 +32,10 @@ panel[type="arrow"][side="right"] {
 }
 
 .panel-arrowcontent {
-  padding: var(--panel-arrowcontent-padding);
-  color: var(--panel-arrowcontent-color);
-  background: var(--panel-arrowcontent-background);
-  border: 1px solid var(--panel-arrowcontent-border-color);
+  padding: var(--arrowpanel-padding);
+  color: var(--arrowpanel-color);
+  background: var(--arrowpanel-background);
+  border: 1px solid var(--arrowpanel-border-color);
   box-shadow: 0 0 4px hsla(0,0%,0%,.2);
   margin: 4px;
 }
@@ -80,8 +80,6 @@ panel[type="arrow"][side="right"] {
 tooltip {
   -moz-appearance: tooltip;
   margin-top: 21px;
-  /* GTK hardcodes this to 4px */
-  padding: 4px;
   max-width: 40em;
   color: InfoText;
   font: message-box;
diff --git a/arc-firefox-theme/chrome/global/scale/scale-tray-horiz.gif b/arc-firefox-theme/chrome/global/scale/scale-tray-horiz.gif
new file mode 100644
index 0000000..b87fe68
--- /dev/null
+++ b/arc-firefox-theme/chrome/global/scale/scale-tray-horiz.gif
diff --git a/arc-firefox-theme/chrome/global/scale/scale-tray-vert.gif b/arc-firefox-theme/chrome/global/scale/scale-tray-vert.gif
new file mode 100644
index 0000000..97687b2
--- /dev/null
+++ b/arc-firefox-theme/chrome/global/scale/scale-tray-vert.gif
diff --git a/arc-firefox-theme/chrome/global/textbox.css b/arc-firefox-theme/chrome/global/textbox.css
index 5cf4ece..9e75e0c 100644
--- a/arc-firefox-theme/chrome/global/textbox.css
+++ b/arc-firefox-theme/chrome/global/textbox.css
@@ -90,58 +90,3 @@ textbox.plain html|*.textbox-textarea {
 toolbarpaletteitem > toolbaritem > textbox > .textbox-input-box > html|*.textbox-input {
   visibility: hidden;
 }
-
-/* ::::: context menu ::::: */
-
-menuitem:not([type]) {
-  -moz-binding: url("chrome://global/content/bindings/menu.xml#menuitem-iconic");
-}
-
-menuitem[cmd="cmd_undo"] {
-  list-style-image: url("moz-icon://stock/gtk-undo?size=menu");
-}
-
-menuitem[cmd="cmd_undo"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-undo?size=menu&state=disabled");
-}
-
-menuitem[cmd="cmd_cut"] {
-  list-style-image: url("moz-icon://stock/gtk-cut?size=menu");
-}
-
-menuitem[cmd="cmd_cut"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-cut?size=menu&state=disabled");
-}
-
-menuitem[cmd="cmd_copy"] {
-  list-style-image: url("moz-icon://stock/gtk-copy?size=menu");
-}
-
-menuitem[cmd="cmd_copy"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-copy?size=menu&state=disabled");
-}
-
-menuitem[cmd="cmd_paste"] {
-  list-style-image: url("moz-icon://stock/gtk-paste?size=menu");
-}
-
-menuitem[cmd="cmd_paste"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-paste?size=menu&state=disabled");
-}
-
-menuitem[cmd="cmd_delete"] {
-  list-style-image: url("moz-icon://stock/gtk-delete?size=menu");
-}
-
-menuitem[cmd="cmd_delete"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-delete?size=menu&state=disabled");
-}
-
-menuitem[cmd="cmd_selectAll"] {
-  list-style-image: url("moz-icon://stock/gtk-select-all?size=menu");
-}
-
-menuitem[cmd="cmd_selectAll"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-select-all?size=menu&state=disabled");
-}
-
diff --git a/arc-firefox-theme/chrome/global/timepicker.css b/arc-firefox-theme/chrome/global/timepicker.css
new file mode 100644
index 0000000..e8d081b
--- /dev/null
+++ b/arc-firefox-theme/chrome/global/timepicker.css
@@ -0,0 +1,153 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+:root {
+  --font-size-default: 1.1rem;
+  --spinner-width: 3rem;
+  --spinner-margin-top-bottom: 0.4rem;
+  --spinner-item-height: 2.4rem;
+  --spinner-item-margin-bottom: 0.1rem;
+  --spinner-button-height: 1.2rem;
+  --colon-width: 2rem;
+  --day-period-spacing-width: 1rem;
+
+  --border: 0.1rem solid #D6D6D6;
+  --border-radius: 0.3rem;
+
+  --font-color: #191919;
+  --fill-color: #EBEBEB;
+
+  --selected-font-color: #FFFFFF;
+  --selected-fill-color: #0996F8;
+
+  --button-font-color: #858585;
+  --button-font-color-hover: #4D4D4D;
+  --button-font-color-active: #191919;
+
+  --disabled-opacity: 0.2;
+}
+
+html {
+  font-size: 10px;
+}
+
+body {
+  margin: 0;
+  color: var(--font-color);
+  font-size: var(--font-size-default);
+}
+
+#time-picker {
+  display: flex;
+  flex-direction: row;
+  justify-content: space-around;
+}
+
+.spinner-container {
+  font-family: sans-serif;
+  display: flex;
+  flex-direction: column;
+  width: var(--spinner-width);
+}
+
+.spinner-container > button {
+  -moz-appearance: none;
+  border: none;
+  background: none;
+  background-color: var(--button-font-color);
+  height: var(--spinner-button-height);
+}
+
+.spinner-container > button:hover {
+  background-color: var(--button-font-color-hover);
+}
+
+.spinner-container > button.active {
+  background-color: var(--button-font-color-active);
+}
+
+.spinner-container > button.up {
+  mask: url("chrome://global/skin/icons/find-arrows.svg#glyph-find-previous") no-repeat 50% 50%;
+}
+
+.spinner-container > button.down {
+  mask: url("chrome://global/skin/icons/find-arrows.svg#glyph-find-next") no-repeat 50% 50%;
+}
+
+.spinner-container.hide-buttons > button {
+  visibility: hidden;
+}
+
+.spinner-container > .spinner {
+  position: relative;
+  width: 100%;
+  margin: var(--spinner-margin-top-bottom) 0;
+  cursor: default;
+  overflow-y: scroll;
+  scroll-snap-type: mandatory;
+  scroll-snap-points-y: repeat(100%);
+}
+
+.spinner-container > .spinner > div {
+  box-sizing: border-box;
+  position: relative;
+  text-align: center;
+  padding: calc((var(--spinner-item-height) - var(--font-size-default)) / 2) 0;
+  margin-bottom: var(--spinner-item-margin-bottom);
+  height: var(--spinner-item-height);
+  -moz-user-select: none;
+  scroll-snap-coordinate: 0 0;
+}
+
+.spinner-container > .spinner > div:hover::before {
+  background: var(--fill-color);
+  border: var(--border);
+  border-radius: var(--border-radius);
+  content: "";
+  position: absolute;
+  top: 0%;
+  bottom: 0%;
+  left: 0%;
+  right: 0%;
+  z-index: -10;
+}
+
+.spinner-container > .spinner:not(.scrolling) > div.selection {
+  color: var(--selected-font-color);
+}
+
+.spinner-container > .spinner > div.selection::before {
+  background: var(--selected-fill-color);
+  border: none;
+  border-radius: var(--border-radius);
+  content: "";
+  position: absolute;
+  top: 0%;
+  bottom: 0%;
+  left: 0%;
+  right: 0%;
+  z-index: -10;
+}
+
+.spinner-container > .spinner > div.disabled::before,
+.spinner-container > .spinner.scrolling > div.selection::before,
+.spinner-container > .spinner.scrolling > div:hover::before {
+  display: none;
+}
+
+.spinner-container > .spinner > div.disabled {
+  opacity: var(--disabled-opacity);
+}
+
+.colon {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  width: var(--colon-width);
+  margin-bottom: 0.3rem;
+}
+
+.spacer {
+  width: var(--day-period-spacing-width);
+}
\ No newline at end of file
diff --git a/arc-firefox-theme/chrome/global/tree.css b/arc-firefox-theme/chrome/global/tree.css
index 1002847..2fb50da 100644
--- a/arc-firefox-theme/chrome/global/tree.css
+++ b/arc-firefox-theme/chrome/global/tree.css
@@ -193,10 +193,6 @@ treechildren::-moz-tree-progressmeter {
   color: ThreeDShadow;
 }
 
-treechildren::-moz-tree-progressmeter(progressUndetermined) {
-  list-style-image: url("chrome://global/skin/progressmeter/progressmeter-busy.gif");
-}
-
 treechildren::-moz-tree-cell-text(progressmeter) {
   margin: 2px 4px;
 }
@@ -345,6 +341,17 @@ treechildren::-moz-tree-cell-text(selected, editing) {
   color: inherit;
 }
 
+treechildren::-moz-tree-cell(active, selected, focus, editing),
+tree[seltype="cell"] > treechildren::-moz-tree-cell(active, selected, focus, editing),
+tree[seltype="text"] > treechildren::-moz-tree-cell(active, selected, focus, editing) {
+  background-color: transparent;
+  border: none;
+}
+
+treechildren::-moz-tree-cell-text(active, selected, editing) {
+  opacity: 0;
+}
+
 .tree-input {
   -moz-appearance: none;
   border: 1px solid Highlight;