diff --git a/package.json b/package.json
index 4bc944f..bf63fb7 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,6 @@
     "@solidjs/meta": "^0.29.4",
     "@solidjs/router": "^0.15.4",
     "codemirror": "^6.0.2",
-    "native-file-system-adapter": "^3.0.1",
     "solid-js": "^1.9.11"
   },
   "packageManager": "pnpm@10.17.1+sha512.17c560fca4867ae9473a3899ad84a88334914f379be46d455cbf92e5cf4b39d34985d452d2583baf19967fa76cb5c17bc9e245529d0b98745721aa7200ecaf7a"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 064e459..c0bd7fc 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -98,9 +98,6 @@ importers:
       codemirror:
         specifier: ^6.0.2
         version: 6.0.2
-      native-file-system-adapter:
-        specifier: ^3.0.1
-        version: 3.0.1
       solid-js:
         specifier: ^1.9.11
         version: 1.9.11
@@ -1122,10 +1119,6 @@ packages:
       picomatch:
         optional: true
 
-  fetch-blob@3.2.0:
-    resolution: {integrity: sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ==}
-    engines: {node: ^12.20 || >= 14.13}
-
   fflate@0.8.2:
     resolution: {integrity: sha512-cPJU47OaAoCbg0pBvzsgpTPhmhqI5eJjh/JIu8tPj5q+T7iLvW/JAYUqmE7KOB4R1ZyEhzBaIQpQpardBF5z8A==}
 
@@ -1278,15 +1271,6 @@ packages:
     engines: {node: ^18 || >=20}
     hasBin: true
 
-  native-file-system-adapter@3.0.1:
-    resolution: {integrity: sha512-ocuhsYk2SY0906LPc3QIMW+rCV3MdhqGiy7wV5Bf0e8/5TsMjDdyIwhNiVPiKxzTJLDrLT6h8BoV9ERfJscKhw==}
-    engines: {node: '>=14.8.0'}
-
-  node-domexception@1.0.0:
-    resolution: {integrity: sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==}
-    engines: {node: '>=10.5.0'}
-    deprecated: Use your platform's native DOMException instead
-
   node-gyp-build@4.8.4:
     resolution: {integrity: sha512-LA4ZjwlnUblHVgq0oBF3Jl/6h/Nvs5fzBLwdEF4nuxnFdsfajde4WfxtJr3CaiH+F6ewcIB/q4jQ4UzPyid+CQ==}
     hasBin: true
@@ -1537,10 +1521,6 @@ packages:
   w3c-keyname@2.2.8:
     resolution: {integrity: sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==}
 
-  web-streams-polyfill@3.3.3:
-    resolution: {integrity: sha512-d2JWLCivmZYTSIoge9MsgFCZrt571BikcWGYkjC1khllbTeDlGqZ2D8vD8E/lJa8WGWbb7Plm8/XJYV7IJHZZw==}
-    engines: {node: '>= 8'}
-
   yallist@3.1.1:
     resolution: {integrity: sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==}
 
@@ -2511,12 +2491,6 @@ snapshots:
     optionalDependencies:
       picomatch: 4.0.3
 
-  fetch-blob@3.2.0:
-    dependencies:
-      node-domexception: 1.0.0
-      web-streams-polyfill: 3.3.3
-    optional: true
-
   fflate@0.8.2: {}
 
   fsevents@2.3.3:
@@ -2625,13 +2599,6 @@ snapshots:
 
   nanoid@5.1.6: {}
 
-  native-file-system-adapter@3.0.1:
-    optionalDependencies:
-      fetch-blob: 3.2.0
-
-  node-domexception@1.0.0:
-    optional: true
-
   node-gyp-build@4.8.4: {}
 
   node-releases@2.0.27: {}
@@ -2817,9 +2784,6 @@ snapshots:
 
   w3c-keyname@2.2.8: {}
 
-  web-streams-polyfill@3.3.3:
-    optional: true
-
   yallist@3.1.1: {}
 
   yocto-queue@1.2.2: {}
diff --git a/src/views/car/unpack.tsx b/src/views/car/unpack.tsx
index 2b0cf22..97a14fd 100644
--- a/src/views/car/unpack.tsx
+++ b/src/views/car/unpack.tsx
@@ -1,7 +1,6 @@
 import { fromStream } from "@atcute/repo";
 import { zip, type ZipEntry } from "@mary/zip";
 import { Title } from "@solidjs/meta";
-import { FileSystemWritableFileStream, showSaveFilePicker } from "native-file-system-adapter";
 import { createSignal, onCleanup } from "solid-js";
 import { createDropHandler, createFileChangeHandler, handleDragOver } from "./file-handlers.js";
 import { createLogger, LoggerView } from "./logger.jsx";
@@ -114,25 +113,26 @@ export const UnpackToolView = () => {
               const waiting = logger.progress(`Waiting for user...`);
 
               try {
-                const fd = await showSaveFilePicker({
-                  suggestedName: `${file.name.replace(/\.car$/, "")}.zip`,
-                  // @ts-expect-error: ponyfill doesn't have full typings
-                  id: "car-unpack",
-                  startIn: "downloads",
-                  types: [
-                    {
-                      description: "ZIP archive",
-                      accept: { "application/zip": [".zip"] },
-                    },
-                  ],
-                }).catch((err) => {
-                  if (err instanceof DOMException && err.name === "AbortError") {
-                    logger.warn(`File picker was cancelled`);
-                  } else {
-                    logger.warn(`Something went wrong when opening the file picker`);
-                  }
-                  return undefined;
-                });
+                // eslint-disable-next-line @typescript-eslint/no-explicit-any
+                const fd = await (window as any).showSaveFilePicker({
+                    suggestedName: `${file.name.replace(/\.car$/, "")}.zip`,
+                    id: "car-unpack",
+                    startIn: "downloads",
+                    types: [
+                      {
+                        description: "ZIP archive",
+                        accept: { "application/zip": [".zip"] },
+                      },
+                    ],
+                  })
+                  .catch((err: unknown) => {
+                    if (err instanceof DOMException && err.name === "AbortError") {
+                      logger.warn(`File picker was cancelled`);
+                    } else {
+                      logger.warn(`Something went wrong when opening the file picker`);
+                    }
+                    return undefined;
+                  });
 
                 if (!fd) {
                   logger.warn(`No file handle obtained`);
@@ -182,9 +182,9 @@ export const UnpackToolView = () => {
         writeCount++;
         // Await every 100th write to apply backpressure
         if (writeCount % 100 === 0) {
-          await writable.write(chunk);
+          await writable.write(chunk as BufferSource);
         } else {
-          writable.write(chunk); // Fire and forget
+          writable.write(chunk as BufferSource);
         }
       }