Add theme: Zen Dense Tabs

themes/b77d8205-984d-45de-bede-54aaa50a7818/chrome.css

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+
+:root {
+    --dense-zen-workspace-indicator-height: calc(var(--zen-workspace-indicator-height) * 0.8);
+    --dense-tab-min-height: calc(var(--tab-min-height) * 0.7);
+}
+
+.zen-current-workspace-indicator {
+    max-height: var(--dense-zen-workspace-indicator-height) !important;
+    min-height: var(--dense-zen-workspace-indicator-height) !important;
+}
+
+.tab-group-label-container {
+    min-height: var(--dense-tab-min-height) !important;
+    max-height: var(--dense-tab-min-height) !important;
+}
+
+.zen-essentials-container zen-workspace-tabs-section {
+    align-items: center;
+}
+
+.tabbrowser-tab .tab-content {
+    min-height: var(--dense-tab-min-height) !important;
+    max-height: var(--dense-tab-min-height) !important;
+    align-self: center !important;
+}
+
+.tabbrowser-tab .tab-icon-stack {
+    align-self: center !important;
+}
+
+.tab-group-label-container .tab-group-folder-icon {
+    display: flex;
+    align-self: center;
+}
+
+.tabbrowser-tab .tab-background {
+    min-height: var(--dense-tab-min-height) !important;
+    max-height: var(--dense-tab-min-height) !important;
+    display: flex !important;
+    align-items: center !important;
+}
+
+.toolbarbutton-text {
+    align-self: center !important;
+}
+
+#tabs-newtab-button, #vertical-tabs-newtab-button {
+    min-height: var(--dense-tab-min-height) !important;
+    max-height: var(--dense-tab-min-height) !important;
+    align-content: center !important;
+    align-items: center !important;
+    align-self: center !important;
+}

themes/b77d8205-984d-45de-bede-54aaa50a7818/readme.md

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+
+# Zen Dense Tabs
+
+A Mod that makes your tabs more compact — reducing vertical space for a denser, efficient layout.
+
+## ✨ Features
+- Shrinks tab and workspace heights using Zen’s built-in CSS variables.
+- Keeps alignment consistent for icons and labels.
+- Lightweight, simple, and compatible with all Zen layouts.
+
+## 🧩 Compatibility
+Developed and Testen on
+Zen Browser
+1.16b (Firefox 143.0.1) (64-bit)
+
+## 📄 License
+MIT © Bischtinius

themes/b77d8205-984d-45de-bede-54aaa50a7818/theme.json

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+{
+    "id": "b77d8205-984d-45de-bede-54aaa50a7818",
+    "name": "Zen Dense Tabs",
+    "description": "A Mod that makes your tabs more compact - reducing vertical space for a denser, efficient layout.",
+    "homepage": "https://github.com/Bischtinius/zen-dense-tabs/",
+    "style": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/b77d8205-984d-45de-bede-54aaa50a7818/chrome.css",
+    "readme": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/b77d8205-984d-45de-bede-54aaa50a7818/readme.md",
+    "image": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/b77d8205-984d-45de-bede-54aaa50a7818/image.png",
+    "author": "Bischtinius",
+    "version": "1.0.0",
+    "tags": [],
+    "createdAt": "2025-10-06",
+    "updatedAt": "2025-10-06"
+}