diff --git a/browser/themes/pinstripe/browser/browser.css b/browser/themes/pinstripe/browser/browser.css
index 2be990990c6..5f3cf7e1f81 100644
--- a/browser/themes/pinstripe/browser/browser.css
+++ b/browser/themes/pinstripe/browser/browser.css
@@ -1344,9 +1344,11 @@ richlistitem[selected="true"][current="true"] > hbox > .ac-result-type-bookmark,
   color: inherit;
 }
 
+/*
 #editBMPanel_tagsField > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input:-moz-placeholder {
   color: #bbb !important;
 }
+*/
 
 #editBMPanel_tagsField[focused="true"],
 #editBMPanel_namePicker[droppable="false"][focused="true"] > .menulist-editable-box {
diff --git a/browser/themes/winstripe/browser/browser.css b/browser/themes/winstripe/browser/browser.css
index 5c6993a96a2..a3b53432aa6 100644
--- a/browser/themes/winstripe/browser/browser.css
+++ b/browser/themes/winstripe/browser/browser.css
@@ -554,10 +554,12 @@ toolbar:not([iconsize="small"])[mode="icons"] #forward-button:not([disabled="tru
   color: black;
 }
 
+/*
 #urlbar:-moz-lwtheme > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input:-moz-placeholder,
 .searchbar-textbox:-moz-lwtheme > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input:-moz-placeholder {
   color: #777;
 }
+*/
 
 #urlbar:-moz-lwtheme[focused="true"],
 .searchbar-textbox:-moz-lwtheme[focused="true"] {
diff --git a/toolkit/content/textbox.css b/toolkit/content/textbox.css
index ccda13dc8fe..09b7b32357d 100644
--- a/toolkit/content/textbox.css
+++ b/toolkit/content/textbox.css
@@ -14,6 +14,7 @@ html|*.textbox-textarea {
   -moz-box-sizing: border-box;
 }
 
+/*
 html|*.textbox-input:-moz-placeholder,
 html|*.textbox-textarea:-moz-placeholder {
   text-align: left;
@@ -25,4 +26,4 @@ html|*.textbox-textarea:-moz-placeholder:-moz-locale-dir(rtl) {
   text-align: right;
   direction: rtl;
 }
-
+*/
diff --git a/toolkit/themes/winstripe/global/textbox-aero.css b/toolkit/themes/winstripe/global/textbox-aero.css
index d9785c149ab..02c0c634c85 100644
--- a/toolkit/themes/winstripe/global/textbox-aero.css
+++ b/toolkit/themes/winstripe/global/textbox-aero.css
@@ -1,5 +1,7 @@
 %include textbox.css
 
+/*
 textbox html|*.textbox-input:-moz-placeholder:-moz-system-metric(windows-default-theme) {
   font-style: italic;
 }
+*/