diff --git a/apps/update/src/app.ts b/apps/update/src/app.ts
index 090df6ae..952c22a3 100644
--- a/apps/update/src/app.ts
+++ b/apps/update/src/app.ts
@@ -1,26 +1,9 @@
+import { parseArgs } from './lib.ts';
 import { updateFirefoxAddons } from '././firefox.ts';
 
-/* Parse Args */
-const args = {} as Record<string, unknown>;
-let lastFlag: string | null = null;
 
-for (let i = 2; i < process.argv.length; ++i) {
-    const arg = process.argv[i];
+const args = parseArgs();
 
-    if (arg.toString().startsWith('-')) {
-        lastFlag = arg.toString().replace(/^-{1,2}/, '');
-        args[lastFlag] = true;
-    }
-    else if (lastFlag) {
-        args[lastFlag] = arg;
-        lastFlag = null;
-    }
-    else {
-        console.error(`Could not parse args: ${arg.toString()}`);
-    }
-}
-
-/* Exec functions based on args */
 if (args['f'] || args['firefox']) {
     console.log(updateFirefoxAddons());
 }
diff --git a/apps/update/src/firefox.ts b/apps/update/src/firefox.ts
index 2e1a8231..29a2f283 100644
--- a/apps/update/src/firefox.ts
+++ b/apps/update/src/firefox.ts
@@ -1,11 +1,26 @@
 import { spawnSync } from 'node:child_process';
 import { readFileSync } from 'node:fs';
 
+import { parseFetchurl } from './lib.ts';
+
 /* Constants */
 const FLAKE = process.env.FLAKE;
 
 
+const updateFFZ = () => {
+    const FILE = `${FLAKE}/pkgs/firefox-addons/default.nix`;
+    const URL = 'https://cdn.frankerfacez.com/script/frankerfacez-4.0-an+fx.xpi';
+
+    const HASH = parseFetchurl(URL);
+
+    spawnSync('sed', ['-i', `'s,url = .*,url = \"${URL}\";,'`, FILE], { shell: true });
+    spawnSync('sed', ['-i', `'s,sha256 = .*,sha256 = \"${HASH}\";,'`, FILE], { shell: true });
+};
+
 export const updateFirefoxAddons = () => {
+    console.log('Updating FFZ addon');
+    updateFFZ();
+
     console.log('Updating firefox addons using mozilla-addons-to-nix');
 
     const DIR = `${FLAKE}/pkgs/firefox-addons`;
diff --git a/apps/update/src/lib.ts b/apps/update/src/lib.ts
new file mode 100644
index 00000000..b59d6079
--- /dev/null
+++ b/apps/update/src/lib.ts
@@ -0,0 +1,30 @@
+import { spawnSync } from 'node:child_process';
+
+
+export const parseArgs = () => {
+    const args = {} as Record<string, unknown>;
+    let lastFlag: string | null = null;
+
+    for (let i = 2; i < process.argv.length; ++i) {
+        const arg = process.argv[i];
+
+        if (arg.toString().startsWith('-')) {
+            lastFlag = arg.toString().replace(/^-{1,2}/, '');
+            args[lastFlag] = true;
+        }
+        else if (lastFlag) {
+            args[lastFlag] = arg;
+            lastFlag = null;
+        }
+        else {
+            console.error(`Could not parse args: ${arg.toString()}`);
+        }
+    }
+
+    return args;
+};
+
+export const parseFetchurl = (url: string) => JSON.parse(spawnSync(
+    'nix', ['store', 'prefetch-file', '--refresh', '--json',
+        '--hash-type', 'sha256', url, '--name', '"escaped"'], { shell: true },
+).stdout.toString()).hash;