diff --git a/docs/docs/CHANGELOG.md b/docs/docs/CHANGELOG.md
index ba8397f..71769e1 100644
--- a/docs/docs/CHANGELOG.md
+++ b/docs/docs/CHANGELOG.md
@@ -20,7 +20,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Disable Open Graph passthrough by default ([#435](https://github.com/TecharoHQ/anubis/issues/435))
 - Clarify the license of the mascot images ([#442](https://github.com/TecharoHQ/anubis/issues/442))
 - Started Suppressing 'Context canceled' errors from http in the logs ([#446](https://github.com/TecharoHQ/anubis/issues/446))
-- Limit concurrency in Firefox and use a pure-JS SHA256 library to eke out more performance in proof of work checking
 
 ## v1.17.1: Asahi sas Brutus: Echo 1
 
diff --git a/package-lock.json b/package-lock.json
index 1902951..106d9e5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,9 +8,6 @@
       "name": "@techaro/anubis",
       "version": "1.18.0-pre1",
       "license": "ISC",
-      "dependencies": {
-        "@aws-crypto/sha256-js": "^5.2.0"
-      },
       "devDependencies": {
         "cssnano": "^7.0.6",
         "cssnano-preset-advanced": "^7.0.6",
@@ -22,44 +19,6 @@
         "postcss-url": "^10.1.3"
       }
     },
-    "node_modules/@aws-crypto/sha256-js": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/@aws-crypto/sha256-js/-/sha256-js-5.2.0.tgz",
-      "integrity": "sha512-FFQQyu7edu4ufvIZ+OadFpHHOt+eSTBaYaki44c+akjg7qZg9oOQeLlk77F6tSYqjDAFClrHJk9tMf0HdVyOvA==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@aws-crypto/util": "^5.2.0",
-        "@aws-sdk/types": "^3.222.0",
-        "tslib": "^2.6.2"
-      },
-      "engines": {
-        "node": ">=16.0.0"
-      }
-    },
-    "node_modules/@aws-crypto/util": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/@aws-crypto/util/-/util-5.2.0.tgz",
-      "integrity": "sha512-4RkU9EsI6ZpBve5fseQlGNUWKMa1RLPQ1dnjnQoe07ldfIzcsGb5hC5W0Dm7u423KWzawlrpbjXBrXCEv9zazQ==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@aws-sdk/types": "^3.222.0",
-        "@smithy/util-utf8": "^2.0.0",
-        "tslib": "^2.6.2"
-      }
-    },
-    "node_modules/@aws-sdk/types": {
-      "version": "3.804.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/types/-/types-3.804.0.tgz",
-      "integrity": "sha512-A9qnsy9zQ8G89vrPPlNG9d1d8QcKRGqJKqwyGgS0dclJpwy6d1EWgQLIolKPl6vcFpLoe6avLOLxr+h8ur5wpg==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@smithy/types": "^4.2.0",
-        "tslib": "^2.6.2"
-      },
-      "engines": {
-        "node": ">=18.0.0"
-      }
-    },
     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.25.3",
       "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.3.tgz",
@@ -485,56 +444,6 @@
         "node": ">=18"
       }
     },
-    "node_modules/@smithy/is-array-buffer": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/@smithy/is-array-buffer/-/is-array-buffer-2.2.0.tgz",
-      "integrity": "sha512-GGP3O9QFD24uGeAXYUjwSTXARoqpZykHadOmA8G5vfJPK0/DC67qa//0qvqrJzL1xc8WQWX7/yc7fwudjPHPhA==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "tslib": "^2.6.2"
-      },
-      "engines": {
-        "node": ">=14.0.0"
-      }
-    },
-    "node_modules/@smithy/types": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/@smithy/types/-/types-4.2.0.tgz",
-      "integrity": "sha512-7eMk09zQKCO+E/ivsjQv+fDlOupcFUCSC/L2YUPgwhvowVGWbPQHjEFcmjt7QQ4ra5lyowS92SV53Zc6XD4+fg==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "tslib": "^2.6.2"
-      },
-      "engines": {
-        "node": ">=18.0.0"
-      }
-    },
-    "node_modules/@smithy/util-buffer-from": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/@smithy/util-buffer-from/-/util-buffer-from-2.2.0.tgz",
-      "integrity": "sha512-IJdWBbTcMQ6DA0gdNhh/BwrLkDR+ADW5Kr1aZmd4k3DIF6ezMV4R2NIAmT08wQJ3yUK82thHWmC/TnK/wpMMIA==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@smithy/is-array-buffer": "^2.2.0",
-        "tslib": "^2.6.2"
-      },
-      "engines": {
-        "node": ">=14.0.0"
-      }
-    },
-    "node_modules/@smithy/util-utf8": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/@smithy/util-utf8/-/util-utf8-2.3.0.tgz",
-      "integrity": "sha512-R8Rdn8Hy72KKcebgLiv8jQcQkXoLMOGGv5uI1/k0l+snqkOzQ1R0ChUBCxWMlBsFMekWjq0wRudIweFs7sKT5A==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@smithy/util-buffer-from": "^2.2.0",
-        "tslib": "^2.6.2"
-      },
-      "engines": {
-        "node": ">=14.0.0"
-      }
-    },
     "node_modules/@trysound/sax": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/@trysound/sax/-/sax-0.2.0.tgz",
@@ -2690,12 +2599,6 @@
         "node": ">=8.0"
       }
     },
-    "node_modules/tslib": {
-      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
-      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
-      "license": "0BSD"
-    },
     "node_modules/universalify": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.1.tgz",
diff --git a/package.json b/package.json
index 233de68..ba59987 100644
--- a/package.json
+++ b/package.json
@@ -24,8 +24,5 @@
     "postcss-import": "^16.1.0",
     "postcss-import-url": "^7.2.0",
     "postcss-url": "^10.1.3"
-  },
-  "dependencies": {
-    "@aws-crypto/sha256-js": "^5.2.0"
   }
 }
diff --git a/web/build.sh b/web/build.sh
index 4c8cdbb..8b5f652 100755
--- a/web/build.sh
+++ b/web/build.sh
@@ -32,9 +32,9 @@ THE SOFTWARE.
 for the JavaScript code in this page.
 */'
 
-for file in js/*.mjs js/worker/*.mjs; do
-  esbuild "${file}" --sourcemap --bundle --minify --outfile=static/"${file}" --banner:js="${LICENSE}"
-  gzip -f -k -n static/${file}
-  zstd -f -k --ultra -22 static/${file}
-  brotli -fZk static/${file}
-done
\ No newline at end of file
+esbuild js/main.mjs --sourcemap --bundle --minify --outfile=static/js/main.mjs "--banner:js=${LICENSE}"
+gzip -f -k -n static/js/main.mjs
+zstd -f -k --ultra -22 static/js/main.mjs
+brotli -fZk static/js/main.mjs
+
+esbuild js/bench.mjs --sourcemap --bundle --minify --outfile=static/js/bench.mjs
\ No newline at end of file
diff --git a/web/js/algorithms/fast.mjs b/web/js/algorithms/fast.mjs
deleted file mode 100644
index 9b5e24b..0000000
--- a/web/js/algorithms/fast.mjs
+++ /dev/null
@@ -1,67 +0,0 @@
-const determineThreadCount = () => {
-  if (navigator.userAgent.includes("Firefox")) {
-    return Math.min(navigator.hardwareConcurrency, 4);
-  }
-
-  if (!!navigator.hardwareConcurrency) {
-    return navigator.hardwareConcurrency;
-  }
-
-  return 1;
-};
-
-export default function process(
-  { basePrefix, version },
-  data,
-  difficulty = 5,
-  signal = null,
-  progressCallback = null,
-  threads = determineThreadCount(),
-) {
-  return new Promise((resolve, reject) => {
-    let webWorkerURL = `${basePrefix}/.within.website/x/cmd/anubis/static/js/worker/fast.mjs?cacheBuster=${version}`;
-
-    const workers = [];
-    const terminate = () => {
-      workers.forEach((w) => w.terminate());
-      if (signal != null) {
-        // clean up listener to avoid memory leak
-        signal.removeEventListener("abort", terminate);
-        if (signal.aborted) {
-          console.log("PoW aborted");
-          reject(false);
-        }
-      }
-    };
-    if (signal != null) {
-      signal.addEventListener("abort", terminate, { once: true });
-    }
-
-    for (let i = 0; i < threads; i++) {
-      let worker = new Worker(webWorkerURL);
-
-      worker.onmessage = (event) => {
-        if (typeof event.data === "number") {
-          progressCallback?.(event.data);
-        } else {
-          terminate();
-          resolve(event.data);
-        }
-      };
-
-      worker.onerror = (event) => {
-        terminate();
-        reject(event);
-      };
-
-      worker.postMessage({
-        data,
-        difficulty,
-        nonce: i,
-        threads,
-      });
-
-      workers.push(worker);
-    }
-  });
-}
diff --git a/web/js/algorithms/slow.mjs b/web/js/algorithms/slow.mjs
deleted file mode 100644
index d5bbd96..0000000
--- a/web/js/algorithms/slow.mjs
+++ /dev/null
@@ -1,48 +0,0 @@
-// https://dev.to/ratmd/simple-proof-of-work-in-javascript-3kgm
-
-export default function process(
-  { basePrefix, version },
-  data,
-  difficulty = 5,
-  signal = null,
-  progressCallback = null,
-  _threads = 1,
-) {
-  return new Promise((resolve, reject) => {
-    let worker = new Worker(`${basePrefix}/.within.website/x/cmd/anubis/static/js/worker/slow.mjs?cacheBuster=${version}`);
-    const terminate = () => {
-      worker.terminate();
-      if (signal != null) {
-        // clean up listener to avoid memory leak
-        signal.removeEventListener("abort", terminate);
-        if (signal.aborted) {
-          console.log("PoW aborted");
-          reject(false);
-        }
-      }
-    };
-    if (signal != null) {
-      signal.addEventListener("abort", terminate, { once: true });
-    }
-
-    worker.onmessage = (event) => {
-      if (typeof event.data === "number") {
-        progressCallback?.(event.data);
-      } else {
-        terminate();
-        resolve(event.data);
-      }
-    };
-
-    worker.onerror = (event) => {
-      terminate();
-      reject(event);
-    };
-
-    worker.postMessage({
-      data,
-      difficulty
-    });
-  });
-}
-
diff --git a/web/js/bench.mjs b/web/js/bench.mjs
index 071af28..c8c69bd 100644
--- a/web/js/bench.mjs
+++ b/web/js/bench.mjs
@@ -1,12 +1,11 @@
-import processFast from "./algorithms/fast.mjs";
-import processSlow from "./algorithms/slow.mjs";
+import processFast from "./proof-of-work.mjs";
+import processSlow from "./proof-of-work-slow.mjs";
 
 const defaultDifficulty = 4;
 const algorithms = {
   fast: processFast,
   slow: processSlow,
 };
-const basePrefix = "";
 
 const status = document.getElementById("status");
 const difficultyInput = document.getElementById("difficulty-input");
@@ -43,7 +42,7 @@ const benchmarkTrial = async (stats, difficulty, algorithm, signal) => {
     .join("");
 
   const t0 = performance.now();
-  const { hash, nonce } = await process({ basePrefix, version: "devel" }, challenge, Number(difficulty), signal);
+  const { hash, nonce } = await process(challenge, Number(difficulty), signal);
   const t1 = performance.now();
   console.log({ hash, nonce });
 
@@ -115,7 +114,6 @@ const benchmarkLoop = async (controller) => {
   } catch (e) {
     if (e !== false) {
       status.innerText = e;
-      throw e;
     }
     return;
   }
diff --git a/web/js/main.mjs b/web/js/main.mjs
index 3f0221a..875d508 100644
--- a/web/js/main.mjs
+++ b/web/js/main.mjs
@@ -1,6 +1,6 @@
-import processFast from "./algorithms/fast.mjs";
-import processSlow from "./algorithms/slow.mjs";
-import { testVideo } from "./tests/video.mjs";
+import processFast from "./proof-of-work.mjs";
+import processSlow from "./proof-of-work-slow.mjs";
+import { testVideo } from "./video.mjs";
 
 const algorithms = {
   "fast": processFast,
@@ -168,7 +168,6 @@ function showContinueBar(hash, nonce, t0, t1) {
   try {
     const t0 = Date.now();
     const { hash, nonce } = await process(
-      basePrefix,
       challenge,
       rules.difficulty,
       null,
diff --git a/web/js/proof-of-work-slow.mjs b/web/js/proof-of-work-slow.mjs
new file mode 100644
index 0000000..0bdc146
--- /dev/null
+++ b/web/js/proof-of-work-slow.mjs
@@ -0,0 +1,90 @@
+// https://dev.to/ratmd/simple-proof-of-work-in-javascript-3kgm
+
+export default function process(
+  data,
+  difficulty = 5,
+  signal = null,
+  progressCallback = null,
+  _threads = 1,
+) {
+  console.debug("slow algo");
+  return new Promise((resolve, reject) => {
+    let webWorkerURL = URL.createObjectURL(new Blob([
+      '(', processTask(), ')()'
+    ], { type: 'application/javascript' }));
+
+    let worker = new Worker(webWorkerURL);
+    const terminate = () => {
+      worker.terminate();
+      if (signal != null) {
+        // clean up listener to avoid memory leak
+        signal.removeEventListener("abort", terminate);
+        if (signal.aborted) {
+          console.log("PoW aborted");
+          reject(false);
+        }
+      }
+    };
+    if (signal != null) {
+      signal.addEventListener("abort", terminate, { once: true });
+    }
+
+    worker.onmessage = (event) => {
+      if (typeof event.data === "number") {
+        progressCallback?.(event.data);
+      } else {
+        terminate();
+        resolve(event.data);
+      }
+    };
+
+    worker.onerror = (event) => {
+      terminate();
+      reject(event);
+    };
+
+    worker.postMessage({
+      data,
+      difficulty
+    });
+
+    URL.revokeObjectURL(webWorkerURL);
+  });
+}
+
+function processTask() {
+  return function () {
+    const sha256 = (text) => {
+      const encoded = new TextEncoder().encode(text);
+      return crypto.subtle.digest("SHA-256", encoded.buffer)
+        .then((result) =>
+          Array.from(new Uint8Array(result))
+            .map((c) => c.toString(16).padStart(2, "0"))
+            .join(""),
+        );
+    };
+
+    addEventListener('message', async (event) => {
+      let data = event.data.data;
+      let difficulty = event.data.difficulty;
+
+      let hash;
+      let nonce = 0;
+      do {
+        if (nonce & 1023 === 0) {
+          postMessage(nonce);
+        }
+        hash = await sha256(data + nonce++);
+      } while (hash.substring(0, difficulty) !== Array(difficulty + 1).join('0'));
+
+      nonce -= 1; // last nonce was post-incremented
+
+      postMessage({
+        hash,
+        data,
+        difficulty,
+        nonce,
+      });
+    });
+  }.toString();
+}
\ No newline at end of file
diff --git a/web/js/proof-of-work.mjs b/web/js/proof-of-work.mjs
new file mode 100644
index 0000000..5ef3a8a
--- /dev/null
+++ b/web/js/proof-of-work.mjs
@@ -0,0 +1,132 @@
+export default function process(
+  data,
+  difficulty = 5,
+  signal = null,
+  progressCallback = null,
+  threads = (navigator.hardwareConcurrency || 1),
+) {
+  console.debug("fast algo");
+  return new Promise((resolve, reject) => {
+    let webWorkerURL = URL.createObjectURL(new Blob([
+      '(', processTask(), ')()'
+    ], { type: 'application/javascript' }));
+
+    const workers = [];
+    const terminate = () => {
+      workers.forEach((w) => w.terminate());
+      if (signal != null) {
+        // clean up listener to avoid memory leak
+        signal.removeEventListener("abort", terminate);
+        if (signal.aborted) {
+          console.log("PoW aborted");
+          reject(false);
+        }
+      }
+    };
+    if (signal != null) {
+      signal.addEventListener("abort", terminate, { once: true });
+    }
+
+    for (let i = 0; i < threads; i++) {
+      let worker = new Worker(webWorkerURL);
+
+      worker.onmessage = (event) => {
+        if (typeof event.data === "number") {
+          progressCallback?.(event.data);
+        } else {
+          terminate();
+          resolve(event.data);
+        }
+      };
+
+      worker.onerror = (event) => {
+        terminate();
+        reject(event);
+      };
+
+      worker.postMessage({
+        data,
+        difficulty,
+        nonce: i,
+        threads,
+      });
+
+      workers.push(worker);
+    }
+
+    URL.revokeObjectURL(webWorkerURL);
+  });
+}
+
+function processTask() {
+  return function () {
+    const sha256 = (text) => {
+      const encoded = new TextEncoder().encode(text);
+      return crypto.subtle.digest("SHA-256", encoded.buffer);
+    };
+
+    function uint8ArrayToHexString(arr) {
+      return Array.from(arr)
+        .map((c) => c.toString(16).padStart(2, "0"))
+        .join("");
+    }
+
+    addEventListener('message', async (event) => {
+      let data = event.data.data;
+      let difficulty = event.data.difficulty;
+      let hash;
+      let nonce = event.data.nonce;
+      let threads = event.data.threads;
+
+      const threadId = nonce;
+
+      while (true) {
+        const currentHash = await sha256(data + nonce);
+        const thisHash = new Uint8Array(currentHash);
+        let valid = true;
+
+        for (let j = 0; j < difficulty; j++) {
+          const byteIndex = Math.floor(j / 2); // which byte we are looking at
+          const nibbleIndex = j % 2; // which nibble in the byte we are looking at (0 is high, 1 is low)
+
+          let nibble = (thisHash[byteIndex] >> (nibbleIndex === 0 ? 4 : 0)) & 0x0F; // Get the nibble
+
+          if (nibble !== 0) {
+            valid = false;
+            break;
+          }
+        }
+
+        if (valid) {
+          hash = uint8ArrayToHexString(thisHash);
+          console.log(hash);
+          break;
+        }
+
+        const oldNonce = nonce;
+        nonce += threads;
+
+        // send a progress update every 1024 iterations. since each thread checks
+        // separate values, one simple way to do this is by bit masking the
+        // nonce for multiples of 1024. unfortunately, if the number of threads
+        // is not prime, only some of the threads will be sending the status
+        // update and they will get behind the others. this is slightly more
+        // complicated but ensures an even distribution between threads.
+        if (
+          nonce > oldNonce | 1023 && // we've wrapped past 1024
+          (nonce >> 10) % threads === threadId // and it's our turn
+        ) {
+          postMessage(nonce);
+        }
+      }
+
+      postMessage({
+        hash,
+        data,
+        difficulty,
+        nonce,
+      });
+    });
+  }.toString();
+}
+
diff --git a/web/js/tests/video.mjs b/web/js/video.mjs
similarity index 100%
rename from web/js/tests/video.mjs
rename to web/js/video.mjs
diff --git a/web/js/worker/fast.mjs b/web/js/worker/fast.mjs
deleted file mode 100644
index a872ad7..0000000
--- a/web/js/worker/fast.mjs
+++ /dev/null
@@ -1,69 +0,0 @@
-import { Sha256 } from '@aws-crypto/sha256-js';
-
-const sha256 = (text) => {
-  const hash = new Sha256();
-  hash.update(text);
-  return hash.digest();
-};
-
-function uint8ArrayToHexString(arr) {
-  return Array.from(arr)
-    .map((c) => c.toString(16).padStart(2, "0"))
-    .join("");
-}
-
-addEventListener('message', async (event) => {
-  let data = event.data.data;
-  let difficulty = event.data.difficulty;
-  let hash;
-  let nonce = event.data.nonce;
-  let threads = event.data.threads;
-
-  const threadId = nonce;
-
-  while (true) {
-    const currentHash = await sha256(data + nonce);
-    const thisHash = new Uint8Array(currentHash);
-    let valid = true;
-
-    for (let j = 0; j < difficulty; j++) {
-      const byteIndex = Math.floor(j / 2); // which byte we are looking at
-      const nibbleIndex = j % 2; // which nibble in the byte we are looking at (0 is high, 1 is low)
-
-      let nibble = (thisHash[byteIndex] >> (nibbleIndex === 0 ? 4 : 0)) & 0x0F; // Get the nibble
-
-      if (nibble !== 0) {
-        valid = false;
-        break;
-      }
-    }
-
-    if (valid) {
-      hash = uint8ArrayToHexString(thisHash);
-      break;
-    }
-
-    const oldNonce = nonce;
-    nonce += threads;
-
-    // send a progress update every 1024 iterations. since each thread checks
-    // separate values, one simple way to do this is by bit masking the
-    // nonce for multiples of 1024. unfortunately, if the number of threads
-    // is not prime, only some of the threads will be sending the status
-    // update and they will get behind the others. this is slightly more
-    // complicated but ensures an even distribution between threads.
-    if (
-      nonce > oldNonce | 1023 && // we've wrapped past 1024
-      (nonce >> 10) % threads === threadId // and it's our turn
-    ) {
-      postMessage(nonce);
-    }
-  }
-
-  postMessage({
-    hash,
-    data,
-    difficulty,
-    nonce,
-  });
-});
\ No newline at end of file
diff --git a/web/js/worker/slow.mjs b/web/js/worker/slow.mjs
deleted file mode 100644
index e98e668..0000000
--- a/web/js/worker/slow.mjs
+++ /dev/null
@@ -1,35 +0,0 @@
-import { Sha256 } from '@aws-crypto/sha256-js';
-
-const sha256 = (text) => {
-  const hash = new Sha256();
-  hash.update(text);
-  return hash.digest()
-    .then((result) =>
-      Array.from(new Uint8Array(result))
-        .map((c) => c.toString(16).padStart(2, "0"))
-        .join(""),
-    );
-};
-
-addEventListener('message', async (event) => {
-  let data = event.data.data;
-  let difficulty = event.data.difficulty;
-
-  let hash;
-  let nonce = 0;
-  do {
-    if ((nonce & 1023) === 0) {
-      postMessage(nonce);
-    }
-    hash = await sha256(data + nonce++);
-  } while (hash.substring(0, difficulty) !== Array(difficulty + 1).join('0'));
-
-  nonce -= 1; // last nonce was post-incremented
-
-  postMessage({
-    hash,
-    data,
-    difficulty,
-    nonce,
-  });
-});