diff --git a/package-lock.json b/package-lock.json
index 06278262..da1ca55b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,7 +23,6 @@
         "@turbowarp/scratch-svg-renderer": "^1.0.0-202401111326-62c0f26",
         "babel-jest": "^27.4.5",
         "babel-loader": "^8.2.3",
-        "comlink": "^4.3.1",
         "copy-webpack-plugin": "^6.4.1",
         "cross-env": "^7.0.3",
         "css-loader": "^5.2.7",
@@ -4719,12 +4718,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/comlink": {
-      "version": "4.4.1",
-      "resolved": "https://registry.npmjs.org/comlink/-/comlink-4.4.1.tgz",
-      "integrity": "sha512-+1dlx0aY5Jo1vHy/tSsIGpSkN4tS9rZSW8FIhG0JH/crs9wwweswIo/POr451r7bZww3hFbPAKnTpimzL/mm4Q==",
-      "dev": true
-    },
     "node_modules/commander": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
diff --git a/package.json b/package.json
index 74f3839e..db5fa9b3 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,6 @@
     "@turbowarp/scratch-svg-renderer": "^1.0.0-202401111326-62c0f26",
     "babel-jest": "^27.4.5",
     "babel-loader": "^8.2.3",
-    "comlink": "^4.3.1",
     "copy-webpack-plugin": "^6.4.1",
     "cross-env": "^7.0.3",
     "css-loader": "^5.2.7",
diff --git a/src/build/auto-comlink-expose-loader.js b/src/build/auto-comlink-expose-loader.js
deleted file mode 100644
index 83ef3c1c..00000000
--- a/src/build/auto-comlink-expose-loader.js
+++ /dev/null
@@ -1,11 +0,0 @@
-const loaderUtils = require('loader-utils');
-
-module.exports.pitch = function (request) {
-  // extra whitespace here won't matter
-  return `
-  import {expose} from 'comlink';
-  import * as mod from ${loaderUtils.stringifyRequest(this, request)};
-  postMessage('ready');
-  expose(mod);
-  `;
-};
diff --git a/src/build/p4-worker-loader.js b/src/build/p4-worker-loader.js
deleted file mode 100644
index e3be146f..00000000
--- a/src/build/p4-worker-loader.js
+++ /dev/null
@@ -1,77 +0,0 @@
-const SingleEntryPlugin = require('webpack/lib/SingleEntryPlugin');
-const path = require('path');
-const loaderUtils = require('loader-utils');
-
-module.exports.pitch = function (request) {
-  if (this.target !== 'web') {
-    return `
-    import * as mod from ${loaderUtils.stringifyRequest(this, request)};
-    const shimmedCreateWorker = () => {
-      return {
-        worker: mod,
-        terminate: () => {}
-      };
-    };
-    export default shimmedCreateWorker;
-    `;
-  }
-  const compilerOptions = this._compiler.options || {};
-  const options = {
-    filename: compilerOptions.output.filename.replace('.js', '.worker.js')
-  };
-  this.cacheable(false);
-  const callback = this.async();
-  const compiler = this._compilation.createChildCompiler('p4 worker loader', options);
-  const exposeLoader = path.resolve(__dirname, 'auto-comlink-expose-loader.js');
-  new SingleEntryPlugin(
-    this.context,
-    `!!${exposeLoader}!${request}`,
-    path.parse(this.resourcePath).name
-  ).apply(compiler);
-  compiler.runAsChild((err, entries, compilation) => {
-    if (err) return callback(err);
-    const file = entries[0].files[0];
-    const inline = !!process.env.STANDALONE;
-    // extra whitespace here won't matter
-    const source = `
-    import {wrap} from 'comlink';
-    const createWorker = () => {
-      ${inline ? `
-        const source = ${JSON.stringify(compilation.assets[file].source())};
-        const blob = new Blob([source]);
-        const url = URL.createObjectURL(blob);
-        const worker = new Worker(url);
-        URL.revokeObjectURL(url);
-      ` : `
-        const worker = new Worker(__webpack_public_path__ + ${JSON.stringify(file)});
-      `}
-      return new Promise((resolve, reject) => {
-        const terminate = () => {
-          worker.terminate();
-        };
-        const onMessage = (e) => {
-          if (e.data === 'ready') {
-            cleanup();
-            resolve({
-              worker: wrap(worker),
-              terminate
-            });
-          }
-        };
-        const onError = () => {
-          cleanup();
-          reject(new Error(${JSON.stringify(`Worker ${file} failed to load. Usually this will be fixed after refreshing.`)}));
-        };
-        const cleanup = () => {
-          worker.removeEventListener('message', onMessage);
-          worker.removeEventListener('error', onError);
-        };
-        worker.addEventListener('message', onMessage);
-        worker.addEventListener('error', onError);
-      });
-    };
-    export default createWorker;
-    `;
-    return callback(null, source);
-  });
-};
diff --git a/src/packager/download-project.js b/src/packager/download-project.js
index c75cbf51..70635c96 100644
--- a/src/packager/download-project.js
+++ b/src/packager/download-project.js
@@ -70,10 +70,12 @@ const mutateScratch3InPlace = (projectData) => {
   optimizeSb3Json(projectData);
 };
 
-export const downloadProject = async (projectData, progressCallback = () => {}) => {
+export const downloadProject = async (projectData, progressCallback = () => {}, signal) => {
   let analysis = unknownAnalysis();
 
   const options = {
+    signal,
+
     onProgress(type, loaded, total) {
       progressCallback(type, loaded, total);
     },
diff --git a/src/packager/load-project.js b/src/packager/load-project.js
index 18725e51..37276748 100644
--- a/src/packager/load-project.js
+++ b/src/packager/load-project.js
@@ -1,30 +1,26 @@
-import {transfer, proxy} from 'comlink';
-import createDownloadWorker from '../build/p4-worker-loader!./download-project';
 import {readAsArrayBuffer} from '../common/readers';
 import request from '../common/request';
 import {AbortError} from '../common/errors';
 
 const downloadProject = async (buffer, progressCallback) => {
-  const {worker, terminate} = await createDownloadWorker();
-  let terminateAndReject;
-  const downloadPromise = new Promise((resolve, reject) => {
-    worker.downloadProject(transfer(buffer, [buffer]), proxy(progressCallback))
-      .then((res) => {
-        terminate();
-        resolve(res);
-      })
-      .catch((err) => {
-        terminate();
-        reject(err)
-      });
-    terminateAndReject = () => {
-      terminate();
-      reject(new AbortError());
-    };
-  });
+  const controller = typeof AbortController === 'function' && new AbortController();
+  const downloadProject = await import(/* webpackChunkName: "downloader" */ './download-project.js');
+  let reject;
   return {
-    promise: downloadPromise,
-    terminate: terminateAndReject
+    promise: new Promise((_resolve, _reject) => {
+      reject = _reject;
+
+      downloadProject.downloadProject(buffer, progressCallback, controller && controller.signal)
+        .then(result => _resolve(result))
+        .catch(err => _reject(err));
+    }),
+
+    terminate: () => {
+      reject(new AbortError());
+      if (controller) {
+        controller.abort();
+      }
+    }
   };
 };