diff --git a/.build.json b/.build.json
index 459b55ab..e5c619de 100644
--- a/.build.json
+++ b/.build.json
@@ -112,13 +112,13 @@
         "external": ["@tensorflow", "fs", "os", "buffer", "util"]
       },
       {
-        "name": "tfjs/browser/esm/bundle",
+        "name": "tfjs/browser/esm/custom",
         "platform": "browser",
+        "target": "esnext",
         "format": "esm",
-        "input": "tfjs/tf-browser.ts",
+        "input": "tfjs/tf-custom.ts",
         "output": "dist/tfjs.esm.js",
-        "minify": false,
-        "sourcemap": true,
+        "sourcemap": false,
         "external": ["fs", "os", "buffer", "util"]
       },
       {
@@ -134,31 +134,10 @@
       {
         "name": "human/browser/esm/bundle",
         "platform": "browser",
+        "target": "esnext",
         "format": "esm",
         "input": "src/human.ts",
         "output": "dist/human.esm.js",
-        "minify": true,
-        "sourcemap": true,
-        "external": ["fs", "os", "buffer", "util"]
-      },
-
-      {
-        "name": "tfjs/browser/esm/custom",
-        "platform": "browser",
-        "target": "esnext",
-        "format": "esm",
-        "input": "tfjs/tf-custom.ts",
-        "output": "dist/tfjs.esm.js",
-        "sourcemap": false,
-        "external": ["fs", "os", "buffer", "util"]
-      },
-      {
-        "name": "human/browser/esm/custom",
-        "platform": "browser",
-        "target": "esnext",
-        "format": "esm",
-        "input": "src/human.ts",
-        "output": "dist/human.custom.esm.js",
         "sourcemap": true,
         "minify": false,
         "external": ["fs", "os", "buffer", "util"],
@@ -174,7 +153,7 @@
         "output": "demo/typescript/index.js",
         "sourcemap": true,
         "minify": false,
-        "external": ["*/human.custom.esm.js"]
+        "external": ["*/human.esm.js"]
       }
     ]
   },
diff --git a/.npmignore b/.npmignore
index 64c274ec..e0b54f43 100644
--- a/.npmignore
+++ b/.npmignore
@@ -4,5 +4,3 @@ samples
 typedoc
 test
 wiki
-dist/tfjs.esm.js
-dist/tfjs.esm.js.map
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d5039af..58872da9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,8 +9,9 @@
   
 ## Changelog
   
-### **HEAD -> main** 2021/10/28 mandic00@live.com
+### **HEAD -> main** 2021/10/29 mandic00@live.com
 
+- fix firefox bug
 
 ### **2.4.3** 2021/10/28 mandic00@live.com
 
diff --git a/demo/benchmark/browser.html b/demo/benchmark/browser.html
index 2df0d892..8f464d1f 100644
--- a/demo/benchmark/browser.html
+++ b/demo/benchmark/browser.html
@@ -26,7 +26,7 @@
     <img id="image" src="../../samples/in/group-1.jpg" alt="test image" style="display: none">
     <div id="log" class="log"></div>
     <script type="module">
-      import Human from '../../dist/human.custom.esm.js';
+      import Human from '../../dist/human.esm.js';
 
       const loop = 20;
 
diff --git a/demo/facematch/facematch.js b/demo/facematch/facematch.js
index a308c4fd..3620297d 100644
--- a/demo/facematch/facematch.js
+++ b/demo/facematch/facematch.js
@@ -6,7 +6,7 @@
  */
 
 /** @type {Human} */
-import Human from '../../dist/human.custom.esm.js';
+import Human from '../../dist/human.esm.js';
 
 const userConfig = {
   backend: 'wasm',
diff --git a/demo/facematch/node-match-worker.js b/demo/facematch/node-match-worker.js
index 37837ef0..35cdbc7d 100644
--- a/demo/facematch/node-match-worker.js
+++ b/demo/facematch/node-match-worker.js
@@ -11,21 +11,21 @@ let records = 0;
 
 const descLength = 1024; // descriptor length in bytes
 
-function distance(descBuffer, index, options = { order: 2 }) {
+function distance(descBuffer, index, options = { order: 2, multiplier: 20 }) {
   const descriptor = new Float32Array(descBuffer);
   let sum = 0;
   for (let i = 0; i < descriptor.length; i++) {
     const diff = (options.order === 2) ? (descriptor[i] - view[index * descLength + i]) : (Math.abs(descriptor[i] - view[index * descLength + i]));
     sum += (options.order === 2) ? (diff * diff) : (diff ** options.order);
   }
-  return sum;
+  return (options.multiplier || 20) * sum;
 }
 
-function match(descBuffer, options = { order: 2 }) {
+function match(descBuffer, options = { order: 2, multiplier: 20 }) {
   let best = Number.MAX_SAFE_INTEGER;
   let index = -1;
   for (let i = 0; i < records; i++) {
-    const res = distance(descBuffer, i, { order: options.order });
+    const res = distance(descBuffer, i, { order: options.order, multiplier: options.multiplier });
     if (res < best) {
       best = res;
       index = i;
diff --git a/demo/facematch/node-match.js b/demo/facematch/node-match.js
index 67ec685e..5562542b 100644
--- a/demo/facematch/node-match.js
+++ b/demo/facematch/node-match.js
@@ -5,19 +5,19 @@ const threads = require('worker_threads');
 
 // global optinos
 const options = {
-  dbFile: './faces.json', // sample face db
+  dbFile: 'demo/facematch/faces.json', // sample face db
   dbMax: 10000, // maximum number of records to hold in memory
-  threadPoolSize: 6, // number of worker threads to create in thread pool
+  threadPoolSize: 12, // number of worker threads to create in thread pool
   workerSrc: './node-match-worker.js', // code that executes in the worker thread
   debug: false, // verbose messages
-  minThreshold: 0.9, // match returns first record that meets the similarity threshold, set to 0 to always scan all records
+  minThreshold: 0.5, // match returns first record that meets the similarity threshold, set to 0 to always scan all records
   descLength: 1024, // descriptor length
 };
 
 // test options
 const testOptions = {
-  dbFact: 100, // load db n times to fake huge size
-  maxJobs: 100, // exit after processing this many jobs
+  dbFact: 175, // load db n times to fake huge size
+  maxJobs: 200, // exit after processing this many jobs
   fuzDescriptors: true, // randomize descriptor content before match for harder jobs
 };
 
diff --git a/demo/multithread/index.js b/demo/multithread/index.js
index e26acd2d..cb282622 100644
--- a/demo/multithread/index.js
+++ b/demo/multithread/index.js
@@ -5,7 +5,7 @@
  *
  */
 
-import Human from '../../dist/human.custom.esm.js'; // equivalent of @vladmandic/human
+import Human from '../../dist/human.esm.js'; // equivalent of @vladmandic/human
 import GLBench from '../helpers/gl-bench.js';
 
 const workerJS = './worker.js';
diff --git a/demo/typescript/index.js b/demo/typescript/index.js
index 977a4321..6a3b657a 100644
--- a/demo/typescript/index.js
+++ b/demo/typescript/index.js
@@ -5,7 +5,7 @@
 */
 
 // demo/typescript/index.ts
-import Human from "../../dist/human.custom.esm.js";
+import Human from "../../dist/human.esm.js";
 var config = {
   modelBasePath: "../../models",
   backend: "humangl",
diff --git a/demo/typescript/index.ts b/demo/typescript/index.ts
index 59672f7e..75e4e902 100644
--- a/demo/typescript/index.ts
+++ b/demo/typescript/index.ts
@@ -7,7 +7,7 @@
  * @license MIT
  */
 
-import Human from '../../dist/human.custom.esm.js'; // equivalent of @vladmandic/human
+import Human from '../../dist/human.esm.js'; // equivalent of @vladmandic/human
 
 const config = {
   modelBasePath: '../../models',
diff --git a/package.json b/package.json
index 5c6e1681..7d5b172e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@vladmandic/human",
-  "version": "2.4.3",
+  "version": "2.5.0",
   "description": "Human: AI-powered 3D Face Detection & Rotation Tracking, Face Description & Recognition, Body Pose Tracking, 3D Hand & Finger Tracking, Iris Analysis, Age & Gender & Emotion Prediction, Gesture Recognition",
   "sideEffects": false,
   "main": "dist/human.node.js",
@@ -73,7 +73,7 @@
     "@vladmandic/pilogger": "^0.3.3",
     "canvas": "^2.8.0",
     "dayjs": "^1.10.7",
-    "esbuild": "^0.13.10",
+    "esbuild": "^0.13.11",
     "eslint": "8.1.0",
     "eslint-config-airbnb-base": "^14.2.1",
     "eslint-plugin-html": "^6.2.0",
@@ -81,7 +81,6 @@
     "eslint-plugin-json": "^3.1.0",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-promise": "^5.1.1",
-    "long": "4.0.0",
     "node-fetch": "^3.0.0",
     "rimraf": "^3.0.2",
     "seedrandom": "^3.0.5",
diff --git a/src/tfjs/types.ts b/src/tfjs/types.ts
index 85a227e6..3e5f19b8 100644
--- a/src/tfjs/types.ts
+++ b/src/tfjs/types.ts
@@ -13,8 +13,7 @@ export { Tensor } from '@tensorflow/tfjs-core/dist/index';
 export { GraphModel } from '@tensorflow/tfjs-converter/dist/index';
 
 /** Tensorflow Long type
- * @external
+ * @external long
  */
+// eslint-disable-next-line node/no-missing-import
 export { Long } from 'long';
-// import Long from 'long';
-// export { Long };
diff --git a/test/browser.html b/test/browser.html
index 94457126..8c93066b 100644
--- a/test/browser.html
+++ b/test/browser.html
@@ -26,7 +26,7 @@
     <div id="state" class="state"></div>
     <canvas id="canvas" class="canvas" width=256 height=256></canvas>
     <script type="module">
-      import Human from '../dist/human.custom.esm.js';
+      import Human from '../dist/human.esm.js';
 
       const config = {
         async: true,
diff --git a/tfjs/tf-custom.ts b/tfjs/tf-custom.ts
index 9fa73d7f..edda5a86 100644
--- a/tfjs/tf-custom.ts
+++ b/tfjs/tf-custom.ts
@@ -1,13 +1,11 @@
-/**
- * Creates tfjs bundle used by Human browser build target
+/** Creates tfjs bundle used by Human browser build target
  * @external
  */
-
-import * as tf from '../../tfjs/dist/tfjs.esm';
+import * as tf from '../../tfjs';
 
 // eslint-disable-next-line import/export
-export * from '../../tfjs/dist/tfjs.esm';
+export * from '../../tfjs';
 
-// needs override
+/** Define custom TFJS version */
 // eslint-disable-next-line import/export
 export const version_core = tf.version['tfjs-core'];
diff --git a/tsconfig.json b/tsconfig.json
index 17b5fe46..532401c6 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,7 @@
     "allowUnusedLabels": false,
     "alwaysStrict": true,
     "declaration": true,
-    "declarationMap": true,
+    "declarationMap": false,
     "emitDecoratorMetadata": true,
     "esModuleInterop": false,
     "exactOptionalPropertyTypes": true,