diff --git a/build/commands/build.ts b/build/commands/build.ts
index ced052a965..fd51b7c496 100644
--- a/build/commands/build.ts
+++ b/build/commands/build.ts
@@ -3,7 +3,7 @@ import { readFileSync, writeFileSync } from "fs";
 import { resolve } from "path";
 import { bin_name, log } from "..";
 import {
-    BUILD_TARGETS,
+    ARCHITECTURE, BUILD_TARGETS,
     CONFIGS_DIR,
     SRC_DIR
 } from "../constants";
@@ -15,16 +15,19 @@ const platform: any = {
     linux: "linux"
 };
 
-const applyConfig = (os: string) => {
+const applyConfig = (os: string, arch: string) => {
     log.info("Applying mozconfig...");
+    
     const commonConfig = readFileSync(
         resolve(CONFIGS_DIR, "common", "mozconfig"),
         "utf-8"
     );
+
     const osConfig = readFileSync(
-        resolve(CONFIGS_DIR, os, "mozconfig"),
+        resolve(CONFIGS_DIR, os, arch === 'i686' ? "mozconfig-i686" : 'mozconfig'),
         "utf-8"
     );
+
     const mergedConfig = `# This file is automatically generated. You should only modify this if you know what you are doing!\n\n${commonConfig}\n\n${osConfig}`;
 
     writeFileSync(
@@ -137,12 +140,18 @@ const success = (date: number) => {
     );
 };
 
-export const build = async (os: string) => {
+interface Options {
+    arch: string
+}
+
+export const build = async (os: string, options: Options) => {
     let d = Date.now();
 
     if (os) {
         // Docker build
 
+        let arch = '64bit'
+
         if (!BUILD_TARGETS.includes(os))
             return log.error(
                 `We do not support "${os}" builds right now.\nWe only currently support ${JSON.stringify(
@@ -150,7 +159,18 @@ export const build = async (os: string) => {
                 )}.`
             );
 
-        applyConfig(os);
+        if (options.arch) {
+            if (!ARCHITECTURE.includes(options.arch))
+                return log.error(
+                    `We do not support "${options.arch}" build right now.\nWe only currently support ${JSON.stringify(
+                        ARCHITECTURE
+                    )}.`
+                )
+            else 
+                arch = options.arch
+        }
+
+        applyConfig(os, options.arch);
 
         setTimeout(async () => {
             await dockerBuild(os).then((_) => success(d));
@@ -162,7 +182,20 @@ export const build = async (os: string) => {
             platform[process.platform as any];
 
         if (BUILD_TARGETS.includes(prettyHost)) {
-            applyConfig(prettyHost);
+            let arch = '64bit'
+            
+            if (options.arch) {
+                if (!ARCHITECTURE.includes(options.arch))
+                    return log.error(
+                        `We do not support "${options.arch}" build right now.\nWe only currently support ${JSON.stringify(
+                            ARCHITECTURE
+                        )}.`
+                    )
+                else 
+                    arch = options.arch
+            }
+
+            applyConfig(prettyHost, options.arch);
 
             setTimeout(async () => {
                 await genericBuild(prettyHost).then((_) =>
diff --git a/build/constants/index.ts b/build/constants/index.ts
index fb425daf19..a0259f5445 100644
--- a/build/constants/index.ts
+++ b/build/constants/index.ts
@@ -7,6 +7,11 @@ export const BUILD_TARGETS = [
     "macos"
 ];
 
+export const ARCHITECTURE = [
+    'i686',
+    'x86_64'
+]
+
 export const PATCH_ARGS = [
     "--ignore-space-change",
     "--ignore-whitespace",
diff --git a/build/index.ts b/build/index.ts
index 8c376d5b08..6c00eb3adb 100644
--- a/build/index.ts
+++ b/build/index.ts
@@ -55,6 +55,7 @@ program
 
 program
     .command("build [os]")
+    .option('--a, --arch <architecture>', 'Specify architecture for build')
     .description(
         "Build Dot Browser. Specify the OS param for cross-platform builds."
     )
diff --git a/configs/linux/mozconfig-i686 b/configs/linux/mozconfig-i686
new file mode 100644
index 0000000000..2a327347b5
--- /dev/null
+++ b/configs/linux/mozconfig-i686
@@ -0,0 +1,16 @@
+# Optimise builds
+ac_add_options --enable-application=browser
+ac_add_options --enable-hardening
+ac_add_options --enable-rust-simd
+ac_add_options --enable-release
+ac_add_options --enable-optimize
+ac_add_options --with-ccache=sccache
+ac_add_options --disable-debug
+ac_add_options --enable-updater
+
+# Disable telemetry and tracking
+mk_add_options MOZ_TELEMETRY_REPORTING=
+mk_add_options MOZ_DATA_REPORTING=
+
+# Support 32-bit builds
+ac_add_options --target=i686
diff --git a/configs/macos/mozconfig-i686 b/configs/macos/mozconfig-i686
new file mode 100644
index 0000000000..759e8f4efc
--- /dev/null
+++ b/configs/macos/mozconfig-i686
@@ -0,0 +1,17 @@
+# Optimise builds
+ac_add_options --enable-application=browser
+ac_add_options --enable-hardening
+ac_add_options --enable-rust-simd
+ac_add_options --enable-release
+ac_add_options --enable-optimize
+ac_add_options --with-ccache=sccache
+ac_add_options --disable-debug
+ac_add_options --enable-updater
+mk_add_options MOZ_MAKE_FLAGS="-j4"
+
+# Disable telemetry and tracking
+mk_add_options MOZ_TELEMETRY_REPORTING=
+mk_add_options MOZ_DATA_REPORTING=
+
+# Support 32-bit builds
+ac_add_options --target=i686
diff --git a/configs/windows/mozconfig-i686 b/configs/windows/mozconfig-i686
new file mode 100644
index 0000000000..2a327347b5
--- /dev/null
+++ b/configs/windows/mozconfig-i686
@@ -0,0 +1,16 @@
+# Optimise builds
+ac_add_options --enable-application=browser
+ac_add_options --enable-hardening
+ac_add_options --enable-rust-simd
+ac_add_options --enable-release
+ac_add_options --enable-optimize
+ac_add_options --with-ccache=sccache
+ac_add_options --disable-debug
+ac_add_options --enable-updater
+
+# Disable telemetry and tracking
+mk_add_options MOZ_TELEMETRY_REPORTING=
+mk_add_options MOZ_DATA_REPORTING=
+
+# Support 32-bit builds
+ac_add_options --target=i686