diff --git a/scripts/patch-desktop-app.mjs b/scripts/patch-desktop-app.mjs
index 7753919..71b5975 100755
--- a/scripts/patch-desktop-app.mjs
+++ b/scripts/patch-desktop-app.mjs
@@ -9,7 +9,7 @@
 const injectTriggerOnce = (file, content) =>
     content +
     (!/require\(['|"]notion-enhancer['|"]\)/.test(content)
-      ? `\n\nrequire("notion-enhancer")('${file}',exports,(js)=>eval(js));`
+      ? `\n\nrequire("notion-enhancer")("${file}",exports,(js)=>eval(js));`
       : ""),
   replaceIfNotFound = ({ string, mode = "replace" }, search, replacement) =>
     string.includes(replacement)
@@ -59,18 +59,11 @@ const patches = {
       protocolInterceptor = `{const n="notion://www.notion.so/__notion-enhancer/";if(e.url.startsWith(n))return require("electron").net.fetch(\`file://\${require("path").join(__dirname,"..","..","node_modules","notion-enhancer",e.url.slice(n.length))}\`)}`;
     prepend(protocolHandler, protocolInterceptor);
     
-    // expose the app config to the global namespace for manipulation
-    // e.g. to enable development mode
+    // expose the app's config + cache + preferences to the global namespace
+    // e.g. to enable development mode or check if keep in background is enabled
     prepend(/\w\.exports=JSON\.parse\('\{"env":"production"/, "globalThis.__notionConfig=");
-
-    // expose the app store to the global namespace for reading
-    // e.g. to check if keep in background is enabled
-    prepend(/\w\.Store=\(0,\w\.configureStore\)/, "globalThis.__notionStore=");
     prepend(/\w\.updatePreferences=\w\.updatePreferences/, "globalThis.__updatePreferences=");
-
-    // conditionally create frameless windows
-    const titlebarStyle = `titleBarStyle:globalThis.__notionConfig?.titlebarStyle??"hiddenInset"`;
-    replace(`titleBarStyle:"hiddenInset"`, titlebarStyle);
+    prepend(/\w\.Store=\(0,\w\.configureStore\)/, "globalThis.__notionStore=");
 
     return content;
   },
diff --git a/src/api/interface.mjs b/src/api/interface.mjs
index 6800dd2..8f8a24f 100644
--- a/src/api/interface.mjs
+++ b/src/api/interface.mjs
@@ -100,7 +100,7 @@ let documentObserver,
     characterData: true,
     // whether to observe added/removed nodes
     childList: true,
-    // whether to observe parent/descendant nodes
+    // whether to observe nested nodes
     subtree: true,
   },
   mutationListeners = [];
diff --git a/src/extensions/focus-mode/client.css b/src/extensions/focus-mode/client.css
deleted file mode 100644
index d615b0c..0000000
--- a/src/extensions/focus-mode/client.css
+++ /dev/null
@@ -1,21 +0,0 @@
-/**
- * notion-enhancer: focus mode
- * (c) 2020 Arecsu
- * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
- * (https://notion-enhancer.github.io/) under the MIT license
- */
-
-.notion-sidebar-container[style*='width: 0px;'] ~ div .notion-topbar > :first-child {
-  opacity: 0 !important;
-  transition: opacity 200ms ease-in-out !important;
-}
-.notion-sidebar-container[style*='width: 0px;'] ~ div .notion-topbar > :first-child:hover {
-  opacity: 1 !important;
-}
-
-[data-focus-mode='padded']
-  .notion-sidebar-container[style*='width: 0px;']
-  ~ div
-  .notion-frame {
-  height: calc(100vh - 90px) !important;
-}
diff --git a/src/extensions/focus-mode/client.mjs b/src/extensions/focus-mode/client.mjs
deleted file mode 100644
index 8423026..0000000
--- a/src/extensions/focus-mode/client.mjs
+++ /dev/null
@@ -1,12 +0,0 @@
-/**
- * notion-enhancer: focus mode
- * (c) 2020 Arecsu
- * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
- * (https://notion-enhancer.github.io/) under the MIT license
- */
-
-'use strict';
-
-export default async function (api, db) {
-  if (await db.get(['padded'])) document.body.dataset.focusMode = 'padded';
-}
diff --git a/src/extensions/focus-mode/mod.json b/src/extensions/focus-mode/mod.json
deleted file mode 100644
index 0ffb3c8..0000000
--- a/src/extensions/focus-mode/mod.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "name": "focus mode",
-  "id": "5a08598d-bfac-4167-9ae8-2bd0e2ef141e",
-  "version": "0.3.0",
-  "description": "hide the titlebar/menubar when the sidebar is closed (returns on hover).",
-  "tags": ["extension", "layout"],
-  "authors": [
-    {
-      "name": "arecsu",
-      "email": "alejandro9r@gmail.com",
-      "homepage": "https://github.com/Arecsu",
-      "avatar": "https://avatars.githubusercontent.com/u/12679098"
-    }
-  ],
-  "css": {
-    "frame": ["tabs.css"],
-    "client": ["client.css"]
-  },
-  "js": {
-    "frame": ["tabs.mjs"],
-    "client": ["client.mjs"]
-  },
-  "options": [
-    {
-      "type": "toggle",
-      "key": "padded",
-      "label": "even padding",
-      "tooltip": "matches the empty space at the top and sides of the frame with **extra padding at the bottom when the sidebar is hidden**",
-      "value": true
-    },
-    {
-      "type": "toggle",
-      "key": "tabs",
-      "label": "hide tabs",
-      "tooltip": "makes the tab bar transparent unless hovered over",
-      "value": false
-    }
-  ]
-}
diff --git a/src/extensions/focus-mode/tabs.css b/src/extensions/focus-mode/tabs.css
deleted file mode 100644
index 8b0414f..0000000
--- a/src/extensions/focus-mode/tabs.css
+++ /dev/null
@@ -1,14 +0,0 @@
-/**
- * notion-enhancer: focus mode
- * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
- * (https://notion-enhancer.github.io/) under the MIT license
- */
-
-[data-focus-mode='hide-tabs'] header:not(:hover) {
-  background: var(--theme--bg);
-  border-bottom-color: transparent;
-}
-[data-focus-mode='hide-tabs'] header:not(:hover) > * {
-  opacity: 0;
-  transition: opacity 200ms ease-in-out;
-}
diff --git a/src/extensions/focus-mode/tabs.mjs b/src/extensions/focus-mode/tabs.mjs
deleted file mode 100644
index 6074834..0000000
--- a/src/extensions/focus-mode/tabs.mjs
+++ /dev/null
@@ -1,12 +0,0 @@
-/**
- * notion-enhancer: focus mode
- * (c) 2020 Arecsu
- * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
- * (https://notion-enhancer.github.io/) under the MIT license
- */
-
-'use strict';
-
-export default async function (api, db) {
-  if (await db.get(['tabs'])) document.body.dataset.focusMode = 'hide-tabs';
-}
diff --git a/src/extensions/focus/client.css b/src/extensions/focus/client.css
new file mode 100644
index 0000000..8f4444b
--- /dev/null
+++ b/src/extensions/focus/client.css
@@ -0,0 +1,23 @@
+/**
+ * notion-enhancer: focus
+ * (c) 2020 Arecsu
+ * (c) 2024 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
+ * (https://notion-enhancer.github.io/) under the MIT license
+ */
+
+/* hide topbar */
+.notion-sidebar-container[aria-hidden] ~ div .notion-topbar {
+  opacity: 0 !important;
+  transition: opacity 200ms ease-in-out !important;
+}
+.notion-sidebar-container[aria-hidden] ~ div .notion-topbar:hover {
+  opacity: 1 !important;
+}
+
+/* hide tabs */
+body > #root.sidebar-collapsed {
+  transition: opacity 200ms ease-in-out;
+}
+body > #root.sidebar-collapsed:not(:hover) {
+  opacity: 0;
+}
diff --git a/src/extensions/focus/client.mjs b/src/extensions/focus/client.mjs
new file mode 100644
index 0000000..e3104ed
--- /dev/null
+++ b/src/extensions/focus/client.mjs
@@ -0,0 +1,23 @@
+/**
+ * notion-enhancer: focus
+ * (c) 2020 Arecsu
+ * (c) 2024 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
+ * (https://notion-enhancer.github.io/) under the MIT license
+ */
+
+export default async (api, db) => {
+  // tabs can only be hidden in the desktop app
+  const { platform, sendMessage, addMutationListener } = api;
+  if (!["linux", "win32", "darwin"].includes(platform)) return;
+
+  let _state;
+  const sidebar = ".notion-sidebar-container",
+    onUpdate = () => {
+      const $sidebar = document.querySelector(sidebar),
+        state = $sidebar.hasAttribute("aria-hidden") ? "collapsed" : "pinned";
+      if (state === _state) return;
+      sendMessage("notion-enhancer:focus", "sidebar-" + (_state = state));
+    };
+  addMutationListener(sidebar, onUpdate, { childList: false, subtree: false });
+  onUpdate();
+};
diff --git a/src/extensions/focus/electron.cjs b/src/extensions/focus/electron.cjs
new file mode 100644
index 0000000..370208c
--- /dev/null
+++ b/src/extensions/focus/electron.cjs
@@ -0,0 +1,17 @@
+/**
+ * notion-enhancer: focus
+ * (c) 2020 Arecsu
+ * (c) 2024 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
+ * (https://notion-enhancer.github.io/) under the MIT license
+ */
+
+"use strict";
+
+module.exports = async (api, db) => {
+  const { ipcMain, BrowserWindow } = require("electron"),
+    channel = "notion-enhancer:focus";
+  ipcMain.on(channel, ({ sender }, message) => {
+    const views = BrowserWindow.fromWebContents(sender).getBrowserViews();
+    for (const view of views) view.webContents.send(channel, message);
+  });
+};
diff --git a/src/extensions/focus/mod.json b/src/extensions/focus/mod.json
new file mode 100644
index 0000000..1d618cd
--- /dev/null
+++ b/src/extensions/focus/mod.json
@@ -0,0 +1,25 @@
+{
+  "name": "Focus",
+  "version": "0.4.0",
+  "id": "5a08598d-bfac-4167-9ae8-2bd0e2ef141e",
+  "description": "Enter focus mode when the left sidebar is closed, hiding Notion's extraneous interface elements (e.g. the topbar) until they are hovered over.",
+  "tags": ["productivity", "focus-mode"],
+  "authors": [
+    {
+      "name": "dragonwocky",
+      "homepage": "https://dragonwocky.me/",
+      "avatar": "https://dragonwocky.me/avatar.jpg"
+    },
+    {
+      "name": "Arecsu",
+      "homepage": "https://github.com/Arecsu",
+      "avatar": "https://avatars.githubusercontent.com/u/12679098"
+    }
+  ],
+  "clientStyles": ["client.css"],
+  "clientScripts": ["client.mjs"],
+  "electronScripts": [
+    [".webpack/main/index.js", "electron.cjs"],
+    [".webpack/renderer/tabs/preload.js", "tabs.cjs"]
+  ]
+}
diff --git a/src/extensions/focus/tabs.cjs b/src/extensions/focus/tabs.cjs
new file mode 100644
index 0000000..fa21713
--- /dev/null
+++ b/src/extensions/focus/tabs.cjs
@@ -0,0 +1,18 @@
+/**
+ * notion-enhancer: focus
+ * (c) 2020 Arecsu
+ * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
+ * (https://notion-enhancer.github.io/) under the MIT license
+ */
+
+"use strict";
+
+module.exports = async (api, db) => {
+  const { onMessage } = api,
+    focusClass = "sidebar-collapsed";
+  onMessage("notion-enhancer:focus", (message) => {
+    const $root = document.querySelector("#root");
+    if (message === "sidebar-pinned") $root?.classList.remove(focusClass);
+    if (message === "sidebar-collapsed") $root?.classList.add(focusClass);
+  });
+};
diff --git a/src/extensions/fonts/client.mjs b/src/extensions/fonts/client.mjs
index f738505..7a22e68 100644
--- a/src/extensions/fonts/client.mjs
+++ b/src/extensions/fonts/client.mjs
@@ -6,9 +6,8 @@
  * (https://notion-enhancer.github.io/) under the MIT license
  */
 
-"use strict";
-
 export default async (api, db) => {
+  const $root = document.documentElement;
   for (const style of [
     "sans",
     "serif",
@@ -19,7 +18,6 @@ export default async (api, db) => {
     "headings",
   ]) {
     const font = await db.get(style);
-    if (!font) continue;
-    document.documentElement.style.setProperty(`--font--${style}`, font);
+    if (font) $root.style.setProperty(`--font--${style}`, font);
   }
 };
diff --git a/src/extensions/fonts/mod.json b/src/extensions/fonts/mod.json
index 9e01474..c2c0d46 100644
--- a/src/extensions/fonts/mod.json
+++ b/src/extensions/fonts/mod.json
@@ -5,15 +5,15 @@
   "description": "Replace Notion's default fonts with any font installed on your system.",
   "tags": ["customisation", "font-chooser"],
   "authors": [
-    {
-      "name": "TorchAtlas",
-      "homepage": "https://github.com/torchatlas/",
-      "avatar": "https://avatars.githubusercontent.com/u/12666855"
-    },
     {
       "name": "dragonwocky",
       "homepage": "https://dragonwocky.me/",
       "avatar": "https://dragonwocky.me/avatar.jpg"
+    },
+    {
+      "name": "TorchAtlas",
+      "homepage": "https://github.com/torchatlas/",
+      "avatar": "https://avatars.githubusercontent.com/u/12666855"
     }
   ],
   "options": [
diff --git a/src/extensions/topbar/electron.cjs b/src/extensions/topbar/electron.cjs
index 1f7f929..1660f71 100644
--- a/src/extensions/topbar/electron.cjs
+++ b/src/extensions/topbar/electron.cjs
@@ -6,7 +6,7 @@
 
 "use strict";
 
-module.exports = async ({}, db) => {
+module.exports = async (api, db) => {
   const { ipcMain, BrowserWindow } = require("electron");
   ipcMain.on("notion-enhancer:topbar", ({ sender }, message) => {
     const window = BrowserWindow.fromWebContents(sender);
diff --git a/src/extensions/tweaks/client.css b/src/extensions/tweaks/client.css
index c8dcd43..98b7864 100644
--- a/src/extensions/tweaks/client.css
+++ b/src/extensions/tweaks/client.css
@@ -1,8 +1,8 @@
 /**
  * notion-enhancer: tweaks
  * (c) 2024 1280px
- * (c) 2021 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
- * (c) 2020 arecsu
+ * (c) 2020 Arecsu
+ * (c) 2024 dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)
  * (https://notion-enhancer.github.io/) under the MIT license
  */
 
diff --git a/src/init.js b/src/init.js
index c691a0b..9ab81a2 100644
--- a/src/init.js
+++ b/src/init.js
@@ -18,11 +18,7 @@ if (isElectron()) {
   require("./api/registry.js");
 
   const { enhancerUrl } = globalThis.__enhancerApi,
-    { getMods, isEnabled, modDatabase } = globalThis.__enhancerApi,
-    API_LOADED = new Promise((res) => {
-      const onReady = globalThis.__enhancerReady;
-      globalThis.__enhancerReady = () => (onReady?.(), res());
-    });
+    { getMods, isEnabled, modDatabase } = globalThis.__enhancerApi;
 
   module.exports = async (target, __exports, __eval) => {
     const __getApi = () => globalThis.__enhancerApi;
@@ -41,10 +37,12 @@ if (isElectron()) {
         document.head.append($script);
 
         // register user-provided javascript for execution in-app
-        const { webFrame } = require("electron"),
-          db = await modDatabase("0f0bf8b6-eae6-4273-b307-8fc43f2ee082"),
-          customScript = (await db.get("customScript"))?.content;
-        if (customScript) webFrame.executeJavaScript(customScript);
+        if (target === ".webpack/renderer/tab_browser_view/preload.js") {
+          const { webFrame } = require("electron"),
+            db = await modDatabase("0f0bf8b6-eae6-4273-b307-8fc43f2ee082"),
+            customScript = (await db.get("customScript"))?.content;
+          if (customScript) webFrame.executeJavaScript(customScript);
+        }
       });
     }
 
@@ -55,7 +53,7 @@ if (isElectron()) {
       for (let [scriptTarget, script] of mod.electronScripts ?? []) {
         if (target !== scriptTarget) continue;
         script = require(`./${mod._src}/${script}`);
-        API_LOADED.then(() => script(__getApi(), db, __exports, __eval));
+        script(__getApi(), db, __exports, __eval);
       }
     }
   };
diff --git a/src/load.mjs b/src/load.mjs
index 1d47870..1c49c04 100644
--- a/src/load.mjs
+++ b/src/load.mjs
@@ -14,11 +14,11 @@ export default (async () => {
     signedIn = localStorage["LRU:KeyValueStore2:current-user-id"],
     pageLoaded = /(^\/$)|((-|\/)[0-9a-f]{32}((\?.+)|$))/.test(location.pathname),
     IS_MENU = location.href.startsWith(enhancerUrl("core/menu/index.html")),
-    IS_TABS = /\/app\/\.webpack\/renderer\/(draggable_)?tabs\/index.html$/.test(location.href),
+    IS_TABS = /\.webpack\/renderer\/tabs\/index.html$/.test(location.href),
     IS_ELECTRON = ['linux', 'win32', 'darwin'].includes(platform),
     API_LOADED = new Promise((res, rej) => {
-      const onReady = globalThis.__enhancerReady;
-      globalThis.__enhancerReady = () => (onReady?.(), res());
+      const onReady = globalThis.__enhancerApi.onReady;
+      globalThis.__enhancerApi.onReady = () => (onReady?.(), res());
     });
   globalThis.IS_TABS = IS_TABS;
 
@@ -72,11 +72,11 @@ export default (async () => {
       Promise.resolve(isCore || API_LOADED)
         .then(() => import(enhancerUrl(`${mod._src}/${script}`)))
         .then((script) => script.default(globalThis.__enhancerApi, db))
-        .then(() => !isCore || globalThis.__enhancerReady?.());
+        .then(() => !isCore || globalThis.__enhancerApi.onReady?.());
     }
   }
 
-  if (IS_MENU || IS_TABS) globalThis.__enhancerReady?.();
+  if (IS_MENU || IS_TABS) globalThis.__enhancerApi.onReady?.();
   return API_LOADED.then(() => {
     if (IS_MENU) console.log("notion-enhancer: ready");
     return globalThis.__enhancerApi;
diff --git a/src/registry.json b/src/registry.json
index cd93a1f..0a288dd 100644
--- a/src/registry.json
+++ b/src/registry.json
@@ -7,5 +7,6 @@
   "extensions/outliner",
   "extensions/word-counter",
   "extensions/no-peeking",
+  "extensions/focus",
   "themes/classic-dark"
 ]
diff --git a/src/themes/neutral/mod.json b/src/themes/neutral/mod.json
index dc17747..f8d7f65 100644
--- a/src/themes/neutral/mod.json
+++ b/src/themes/neutral/mod.json
@@ -7,7 +7,7 @@
   "tags": ["theme", "dark"],
   "authors": [
     {
-      "name": "arecsu",
+      "name": "Arecsu",
       "email": "alejandro9r@gmail.com",
       "homepage": "https://github.com/Arecsu",
       "avatar": "https://avatars.githubusercontent.com/u/12679098"
diff --git a/src/worker.js b/src/worker.js
index 8328e48..9d77973 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -215,4 +215,3 @@ if (IS_ELECTRON) {
 }
 
 Object.assign((globalThis.__enhancerApi ??= {}), { queryDatabase });
-globalThis.__enhancerReady?.();