diff --git a/assets/moz.build b/assets/moz.build
index b7254f6..fd01f49 100644
--- a/assets/moz.build
+++ b/assets/moz.build
@@ -4,6 +4,8 @@ FINAL_TARGET_FILES += [
 
 FINAL_TARGET_FILES.distribution += [
   "policies.json",
+  "userChrome.css",
+  "userContent.css",
 ]
 
 # local-settings does not yet end up being pacakged.
diff --git a/assets/prefs.js b/assets/prefs.js
index 97b3e46..16c7333 100644
--- a/assets/prefs.js
+++ b/assets/prefs.js
@@ -1,6 +1,11 @@
 // misc
 pref("browser.newtabpage.enabled", false);
 pref("browser.startup.homepage", "about:blank");
+lockPref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
+lockPref("browser.uidensity", 1);
+
+// Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1420777
+lockPref("network.http.http2.coalesce-hostnames", false);
 
 // ads & annoyances
 pref("extensions.getAddons.showPane", false);
diff --git a/assets/userChrome.css b/assets/userChrome.css
new file mode 100644
index 0000000..bf8bc43
--- /dev/null
+++ b/assets/userChrome.css
@@ -0,0 +1,102 @@
+/* General UI customizations */
+
+:root {
+  --uc-toolbar-height: 35px;
+}
+
+:root:not([sizemode="fullscreen"]) {
+  --uc-window-control-width: 65px;
+}
+
+.titlebar-buttonbox,
+#window-controls {
+  color: var(--toolbar-color);
+}
+
+:root[sizemode="fullscreen"] .titlebar-buttonbox-container {
+  display: none
+}
+
+:root[sizemode="fullscreen"] #navigator-toolbox {
+  position: relative;
+}
+
+:root[sizemode="fullscreen"] #TabsToolbar>.titlebar-buttonbox-container:last-child,
+:root[sizemode="fullscreen"] #window-controls {
+  position: absolute;
+  display: flex;
+  top: 0;
+  right: 0;
+  height: 40px;
+}
+
+:root[sizemode="fullscreen"] #TabsToolbar>.titlebar-buttonbox-container:last-child,
+:root[uidensity="compact"][sizemode="fullscreen"] #window-controls {
+  height: 32px
+}
+
+:root #nav-bar {
+  border-inline: 0 solid transparent;
+  border-inline-style: solid !important;
+  border-right-width: calc(var(--uc-window-control-width, 0px));
+  border-inline-width: var(--uc-window-control-width, 0px) 0px;
+  background-clip: border-box !important;
+}
+
+#TabsToolbar>* {
+  visibility: collapse !important
+}
+
+:root[sizemode="fullscreen"] #TabsToolbar>#window-controls {
+  visibility: visible !important;
+  z-index: 2
+}
+
+#TabsToolbar>.titlebar-buttonbox-container {
+  visibility: visible !important;
+  height: var(--uc-toolbar-height) !important;
+}
+
+#nav-bar {
+  margin-top: calc(0px - var(--uc-toolbar-height));
+}
+
+:root[inFullscreen] #navigator-toolbox {
+  margin-top: 15px
+}
+
+#sidebar-header {
+  display: none;
+}
+
+#sidebar-splitter {
+  --sidebar-border-color: var(--chrome-content-separator-color);
+}
+
+#navigator-toolbox {
+  --toolbarbutton-hover-background: hsla(0, 0%, 70%, 0.15);
+}
+
+#urlbar-background {
+  --toolbar-field-focus-border-color: #c44aa0; /* orig: #a86595 */
+}
+
+#tracking-protection-icon-container {
+    display: none;
+}
+
+/* Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1721612 */
+
+@font-face {
+  font-family: system-ui;
+  src: local('SF Pro Display');
+}
+
+@font-face {
+  font-family: -apple-system;
+  src: local('SF Pro Display');
+}
+
+* {
+  font-family: system-ui;
+}
diff --git a/assets/userContent.css b/assets/userContent.css
new file mode 100644
index 0000000..d1a68de
--- /dev/null
+++ b/assets/userContent.css
@@ -0,0 +1,9 @@
+@font-face {
+  font-family: system-ui;
+  src: local('SF Pro Display');
+}
+
+@font-face {
+  font-family: -apple-system;
+  src: local('SF Pro Display');
+}
diff --git a/build.sh b/build.sh
index 757f6d9..c7041f2 100755
--- a/build.sh
+++ b/build.sh
@@ -9,7 +9,7 @@ git clean -fd
 # Prepare assets
 mkdir -p snowleopard
 cp ../assets/mozconfig mozconfig
-cp ../assets/{local-settings.js,prefs.js,policies.json,moz.build} snowleopard/
+cp ../assets/{local-settings.js,prefs.js,policies.json,moz.build,userChrome.css,userContent.css} snowleopard/
 
 # Prepare patches
 for patch in ../patches/*.patch; do
diff --git a/patches/0009-userchrome.patch b/patches/0009-userchrome.patch
new file mode 100644
index 0000000..5a614f2
--- /dev/null
+++ b/patches/0009-userchrome.patch
@@ -0,0 +1,25 @@
+diff --git a/toolkit/xre/nsXREDirProvider.cpp b/toolkit/xre/nsXREDirProvider.cpp
+index dac063c8a17fc..4bdd21bca9588 100644
+--- a/toolkit/xre/nsXREDirProvider.cpp
++++ b/toolkit/xre/nsXREDirProvider.cpp
+@@ -455,16 +455,10 @@ nsXREDirProvider::GetFile(const char* aProperty, bool* aPersistent,
+   }
+ #endif  // defined(MOZ_CONTENT_TEMP_DIR)
+   else if (!strcmp(aProperty, NS_APP_USER_CHROME_DIR)) {
+-    // It isn't clear why this uses GetProfileStartupDir instead of
+-    // GetProfileDir. It could theoretically matter in a non-main
+-    // process where some other directory provider has defined
+-    // NS_APP_USER_PROFILE_50_DIR. In that scenario, using
+-    // GetProfileStartupDir means this will fail instead of succeed.
+-    rv = GetProfileStartupDir(getter_AddRefs(file));
+-    if (NS_FAILED(rv)) {
+-      return rv;
+-    }
+-    rv = file->AppendNative("chrome"_ns);
++    bool persistent = false;
++    rv = GetFile(NS_GRE_DIR, &persistent, getter_AddRefs(file));
++    NS_ENSURE_SUCCESS(rv, rv);
++    rv = file->AppendNative("distribution"_ns);
+   } else if (!strcmp(aProperty, NS_APP_PREFS_50_DIR)) {
+     rv = GetProfileDir(getter_AddRefs(file));
+     if (NS_FAILED(rv)) {
diff --git a/patches/0010-toolbar.patch b/patches/0010-toolbar.patch
new file mode 100644
index 0000000..046e873
--- /dev/null
+++ b/patches/0010-toolbar.patch
@@ -0,0 +1,15 @@
+diff --git a/browser/components/customizableui/CustomizableUI.sys.mjs b/browser/components/customizableui/CustomizableUI.sys.mjs
+index d748b93a92455..4183758ae427e 100644
+--- a/browser/components/customizableui/CustomizableUI.sys.mjs
++++ b/browser/components/customizableui/CustomizableUI.sys.mjs
+@@ -249,10 +249,7 @@ var CustomizableUIInternal = {
+       Services.policies.isAllowed("removeHomeButtonByDefault")
+         ? null
+         : "home-button",
+-      "spring",
+       "urlbar-container",
+-      "spring",
+-      "save-to-pocket-button",
+       "downloads-button",
+       AppConstants.MOZ_DEV_EDITION ? "developer-button" : null,
+       "fxa-toolbar-menu-button",
diff --git a/start.sh b/start.sh
index 41890be..729e7c1 100755
--- a/start.sh
+++ b/start.sh
@@ -2,4 +2,5 @@
 set -e
 
 cd ./mozilla-unified
+#MOZ_LOG=nsHttp:5 ./mach run
 ./mach run