--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -216,19 +216,16 @@ pref("browser.eme.ui.enabled", false);
 pref("browser.uitour.enabled", true);
 pref("browser.uitour.loglevel", "Error");
 pref("browser.uitour.requireSecure", true);
 pref("browser.uitour.themeOrigin", "https://addons.mozilla.org/%LOCALE%/firefox/themes/");
 pref("browser.uitour.url", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/tour/");
 // How long to show a Hearbeat survey (two hours, in seconds)
 pref("browser.uitour.surveyDuration", 7200);
 
-pref("browser.customizemode.tip0.shown", false);
-pref("browser.customizemode.tip0.learnMoreUrl", "https://support.mozilla.org/1/firefox/%VERSION%/%OS%/%LOCALE%/customize");
-
 pref("keyword.enabled", true);
 pref("browser.fixup.domainwhitelist.localhost", true);
 
 pref("general.useragent.locale", "@AB_CD@");
 pref("general.skins.selectedSkin", "classic/1.0");
 
 pref("general.smoothScroll", true);
 #ifdef UNIX_BUT_NOT_MAC

--- a/browser/components/customizableui/CustomizeMode.jsm
+++ b/browser/components/customizableui/CustomizeMode.jsm
@@ -99,17 +99,16 @@ function CustomizeMode(aWindow) {
   this.areas = new Set();
 
   // There are two palettes - there's the palette that can be overlayed with
   // toolbar items in browser.xul. This is invisible, and never seen by the
   // user. Then there's the visible palette, which gets populated and displayed
   // to the user when in customizing mode.
   this.visiblePalette = this.document.getElementById(kPaletteId);
   this.paletteEmptyNotice = this.document.getElementById("customization-empty");
-  this.tipPanel = this.document.getElementById("customization-tipPanel");
   if (Services.prefs.getCharPref("general.skins.selectedSkin") != "classic/1.0") {
     let lwthemeButton = this.document.getElementById("customization-lwtheme-button");
     lwthemeButton.setAttribute("hidden", "true");
   }
   if (AppConstants.CAN_DRAW_IN_TITLEBAR) {
     this._updateTitlebarCheckbox();
     this._updateDragSpaceCheckbox();
     Services.prefs.addObserver(kDrawInTitlebarPref, this);
@@ -387,18 +386,16 @@ CustomizeMode.prototype = {
     }
 
     if (this.resetting) {
       log.debug("Attempted to exit while we're resetting. " +
                 "We'll exit after resetting has finished.");
       return;
     }
 
-    this.hideTip();
-
     this._handler.isExitingCustomizeMode = true;
 
     this._removeExtraToolbarsIfEmpty();
 
     this._teardownDownloadAutoHideToggle();
 
     CustomizableUI.removeListener(this);
 
@@ -544,54 +541,16 @@ CustomizeMode.prototype = {
 
     let deck = this.document.getElementById("tab-view-deck");
     let toolboxRect = this.window.gNavToolbox.getBoundingClientRect();
     let height = toolboxRect.bottom;
     deck.style.setProperty("--toolbox-rect-height", `${height}`);
     deck.style.setProperty("--toolbox-rect-height-with-unit", `${height}px`);
   },
 
-  maybeShowTip(aAnchor) {
-    const kShownPref = "browser.customizemode.tip0.shown";
-    let shown = Services.prefs.getBoolPref(kShownPref, false);
-    if (shown)
-      return;
-
-    let anchorNode = aAnchor || this.document.getElementById("customization-panelHolder");
-    let messageNode = this.tipPanel.querySelector(".customization-tipPanel-contentMessage");
-    if (!messageNode.childElementCount) {
-      // Put the tip contents in the popup.
-      let bundle = this.document.getElementById("bundle_browser");
-      const kLabelClass = "customization-tipPanel-link";
-      // eslint-disable-next-line no-unsanitized/property
-      messageNode.innerHTML = bundle.getFormattedString("customizeTips.tip0", [
-        "<label class=\"customization-tipPanel-em\" value=\"" +
-          bundle.getString("customizeTips.tip0.hint") + "\"/>",
-        this.document.getElementById("bundle_brand").getString("brandShortName"),
-        "<label class=\"" + kLabelClass + " text-link\" value=\"" +
-        bundle.getString("customizeTips.tip0.learnMore") + "\"/>"
-      ]);
-
-      messageNode.querySelector("." + kLabelClass).addEventListener("click", () => {
-        let url = Services.urlFormatter.formatURLPref("browser.customizemode.tip0.learnMoreUrl");
-        let browser = this.browser;
-        browser.selectedTab = browser.addTab(url);
-        this.hideTip();
-      });
-    }
-
-    this.tipPanel.hidden = false;
-    this.tipPanel.openPopup(anchorNode);
-    Services.prefs.setBoolPref(kShownPref, true);
-  },
-
-  hideTip() {
-    this.tipPanel.hidePopup();
-  },
-
   _getCustomizableChildForNode(aNode) {
     // NB: adjusted from _getCustomizableParent to keep that method fast
     // (it's used during drags), and avoid multiple DOM loops
     let areas = CustomizableUI.areas;
     // Caching this length is important because otherwise we'll also iterate
     // over items we add to the end from within the loop.
     let numberOfAreas = areas.length;
     for (let i = 0; i < numberOfAreas; i++) {

--- a/browser/components/customizableui/content/panelUI.inc.xul
+++ b/browser/components/customizableui/content/panelUI.inc.xul
@@ -374,35 +374,16 @@
     <menuseparator/>
     <menuitem command="cmd_CustomizeToolbars"
               class="viewCustomizeToolbar"
               accesskey="&viewCustomizeToolbar.accesskey;"
               label="&viewCustomizeToolbar.label;"/>
   </menupopup>
 </panel>
 
-<panel id="customization-tipPanel"
-       type="arrow"
-       flip="none"
-       side="left"
-       position="leftcenter topright"
-       noautohide="true"
-       hidden="true">
-  <hbox class="customization-tipPanel-wrapper">
-    <vbox class="customization-tipPanel-infoBox"/>
-    <vbox class="customization-tipPanel-content" flex="1">
-      <description class="customization-tipPanel-contentMessage"/>
-      <image class="customization-tipPanel-contentImage"/>
-    </vbox>
-    <vbox pack="start" align="end" class="customization-tipPanel-closeBox">
-      <toolbarbutton oncommand="gCustomizeMode.hideTip()" class="close-icon"/>
-    </vbox>
-  </hbox>
-</panel>
-
 <panel id="panic-button-success-notification"
        type="arrow"
        position="bottomcenter topright"
        hidden="true"
        role="alert"
        orient="vertical">
   <hbox id="panic-button-success-header">
     <image id="panic-button-success-icon" alt=""/>

--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@@ -1682,17 +1682,17 @@ BrowserGlue.prototype = {
         return;
       this._openPreferences("sync", { origin: "doorhanger" });
     }
     this.AlertsService.showAlertNotification(null, title, body, true, null, clickCallback);
   },
 
   // eslint-disable-next-line complexity
   _migrateUI: function BG__migrateUI() {
-    const UI_VERSION = 54;
+    const UI_VERSION = 55;
     const BROWSER_DOCURL = "chrome://browser/content/browser.xul";
 
     let currentUIVersion;
     if (Services.prefs.prefHasUserValue("browser.migration.version")) {
       currentUIVersion = Services.prefs.getIntPref("browser.migration.version");
     } else {
       // This is a new profile, nothing to migrate.
       Services.prefs.setIntPref("browser.migration.version", UI_VERSION);
@@ -2082,16 +2082,20 @@ BrowserGlue.prototype = {
       // Migrate browser.onboarding.hidden to browser.onboarding.state.
       if (Services.prefs.prefHasUserValue("browser.onboarding.hidden")) {
         let state = Services.prefs.getBoolPref("browser.onboarding.hidden") ? "watermark" : "default";
         Services.prefs.setStringPref("browser.onboarding.state", state);
         Services.prefs.clearUserPref("browser.onboarding.hidden");
       }
     }
 
+    if (currentUIVersion < 55) {
+      Services.prefs.clearUserPref("browser.customizemode.tip0.shown");
+    }
+
     // Update the migration version.
     Services.prefs.setIntPref("browser.migration.version", UI_VERSION);
   },
 
   _checkForDefaultBrowser() {
     // Perform default browser checking.
     if (!ShellService) {
       return;

--- a/browser/locales/en-US/chrome/browser/browser.properties
+++ b/browser/locales/en-US/chrome/browser/browser.properties
@@ -763,23 +763,16 @@ slowStartup.helpButton.accesskey = L
 slowStartup.disableNotificationButton.label = Don’t Tell Me Again
 slowStartup.disableNotificationButton.accesskey = A
 
 # LOCALIZATION NOTE  - %S is brandShortName
 flashHang.message = %S changed some Adobe Flash settings to improve performance.
 flashHang.helpButton.label = Learn More…
 flashHang.helpButton.accesskey = L
 
-# LOCALIZATION NOTE(customizeTips.tip0): %1$S will be replaced with the text defined
-# in customizeTips.tip0.hint, %2$S will be replaced with brandShortName, %3$S will
-# be replaced with a hyperlink containing the text defined in customizeTips.tip0.learnMore.
-customizeTips.tip0 = %1$S: You can customize %2$S to work the way you do. Simply drag any of the above to the menu or toolbar. %3$S about customizing %2$S.
-customizeTips.tip0.hint = Hint
-customizeTips.tip0.learnMore = Learn more
-
 # LOCALIZATION NOTE (customizeMode.tabTitle): %S is brandShortName
 customizeMode.tabTitle = Customize %S
 
 # LOCALIZATION NOTE (appMenuRemoteTabs.mobilePromo.text2):
 # %1$S will be replaced with a link, the text of which is
 # appMenuRemoteTabs.mobilePromo.android and the link will be to
 # https://www.mozilla.org/firefox/android/.
 # %2$S will be replaced with a link, the text of which is

--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -1077,24 +1077,16 @@ notification[value="translation"] {
  * labels during the customize mode transition. Subpixel anti-aliasing
  * on Windows with Direct2D layers acceleration is particularly slow to
  * paint, so this hack is how we sidestep that performance bottleneck.
  */
 #main-window:-moz-any([customize-entering],[customize-exiting]) label {
   transform: perspective(0.01px);
 }
 
-#customization-tipPanel > .panel-arrowcontainer > .panel-arrowbox > .panel-arrow[side="left"] {
-  margin-right: -2px;
-}
-
-#customization-tipPanel > .panel-arrowcontainer > .panel-arrowbox > .panel-arrow[side="right"] {
-  margin-left: -2px;
-}
-
 /* End customization mode */
 
 /* Private browsing indicators */
 
 /**
  * Currently, we have two places where we put private browsing indicators on
  * Windows. When tabsintitlebar is enabled, we draw the indicator in the titlebar.
  * When tabsintitlebar is disabled, we draw the indicator at the end of the