diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 4f145c494973374e87f3a3ed5eb6b33a43c518c8..8518d8a337acab19fb3bc22e8d5b3e8b1ee7902a 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -13,6 +13,13 @@ ChromeUtils.importESModule("resource://gre/modules/NotificationDB.sys.mjs");
 
 // lazy module getters
 
+XPCOMUtils.defineLazyServiceGetter(
+  this,
+  "ProfileService",
+  "@mozilla.org/toolkit/profile-service;1",
+  "nsIToolkitProfileService"
+);
+
 ChromeUtils.defineESModuleGetters(this, {
   AMTelemetry: "resource://gre/modules/AddonManager.sys.mjs",
   AboutNewTab: "resource:///modules/AboutNewTab.sys.mjs",
@@ -2424,6 +2431,10 @@ var gBrowserInit = {
         "browser-idle-startup-tasks-finished"
       );
     });
+
+    // ZEN: Propagate the current profile used to the browser UI, such as 
+    // showing the avatar and profile info to the side bar
+    scheduleIdleTask(zenUpdateBrowserProfiles);
   },
 
   // Returns the URI(s) to load at startup if it is immediately known, or a
@@ -6660,7 +6671,7 @@ function setToolbarVisibility(
       );
     }
 
-    const overlapAttr = "BookmarksToolbarOverlapsBrowser";
+    const overlapAttr = "BookmarksToolbarOverlapsBrowser__ignore"; // Original string was "BookmarksToolbarOverlapsBrowser" but it's not used and it only bugs the UI.
     switch (isVisible) {
       case true:
       case "always":
@@ -10157,3 +10168,17 @@ var FirefoxViewHandler = {
     this.button?.toggleAttribute("attention", shouldShow);
   },
 };
+
+function zenUpdateBrowserProfiles() {
+  const mainWindowEl = document.documentElement;
+  // Dont override the sync avatar if it's already set
+  if (mainWindowEl.style.hasOwnProperty("--avatar-image-url")) {
+    return;
+  }
+  let profile = ProfileService.currentProfile;
+  console.log(profile)
+  console.log(profile.zenAvatarPath)
+  if (profile.zenAvatarPath == "") return;
+  // TODO: actually use profile data to generate the avatar, instead of just using the name
+  mainWindowEl.style.setProperty("--avatar-image-url", `url(${profile.zenAvatarPath})`);
+}