diff --git a/README.md b/README.md
index 7407213..4de6d0b 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,18 @@ npm run start --prefix ./ext
 * `--skipNativeBuilds`  
     macOS only. Skips native receiver selector build.
 
+
+#### 32-bit on Windows
+
+Building a 32-bit version is only supported for Windows. If you're building from a 64-bit system, you'll also need to rebuild any native dependencies as 32-bit.
+
+````sh
+npm clean-install --prefix ./app --arch=ia32  # If on a 64-bit system
+
+npm run build:app -- -- --arch=x86 --usePkg   # If building without packaging
+npm run package:app -- -- --arch=x86          # ... else if packaging
+````
+
 ### Packaging
 
 Build and package extension and bridge application for current platform:
diff --git a/app/bin/build.js b/app/bin/build.js
index 6a4bb61..941646c 100644
--- a/app/bin/build.js
+++ b/app/bin/build.js
@@ -13,22 +13,13 @@ const pkg = require("pkg");
 const { spawnSync } = require("child_process");
 
 const meta = require("../package.json");
+const paths = require("./lib/paths");
 
 const { author
       , homepage } = require("../../package.json");
 
 const { __extensionId: extensionId } = require("../../ext/package.json");
 
-const { executableName
-      , executablePath
-      , manifestName
-      , manifestPath
-      , selectorExecutableName
-      , pkgPlatform
-      , DIST_PATH
-      , LICENSE_PATH
-      , WIN_REGISTRY_KEY } = require("./lib/paths");
-
 
 // Command line args
 const argv = minimist(process.argv.slice(2), {
@@ -46,6 +37,7 @@ const argv = minimist(process.argv.slice(2), {
 
 const supportedTargets = [
     "win-x64"
+  , "win-x86"
   , "macos-x64"
   , "linux-x64"
 ];
@@ -60,7 +52,7 @@ for (const target of supportedTargets) {
     supportedArchs.push(arch);
 }
 
-if (!supportedPlatforms.includes(pkgPlatform[process.platform])) {
+if (!supportedPlatforms.includes(paths.pkgPlatformMap[process.platform])) {
     console.error("Unsupported target platform");
     process.exit(1);
 }
@@ -84,9 +76,9 @@ const spawnOptions = {
  * build directories, just in case.
  */
 fs.removeSync(BUILD_PATH);
-fs.removeSync(DIST_PATH);
+fs.removeSync(paths.DIST_PATH);
 fs.ensureDirSync(BUILD_PATH);
-fs.ensureDirSync(DIST_PATH, { recursive: true });
+fs.ensureDirSync(paths.DIST_PATH, { recursive: true });
 
 
 const MDNS_BINDING_PATH = path.join(
@@ -127,6 +119,9 @@ async function build () {
             }
         };
 
+        const executableName = paths.getExecutableName(process.platform);
+        const executablePath = paths.getExecutablePath(process.platform, argv.arch);
+
         // Write pkg manifest
         fs.writeFileSync(path.join(BUILD_PATH, "src/package.json")
               , JSON.stringify(pkgManifest))
@@ -134,8 +129,8 @@ async function build () {
         // Run pkg to create a single executable
         await pkg.exec([
             path.join(BUILD_PATH, "src")
-          , "--target", `node12-${pkgPlatform[process.platform]}-${argv.arch}`
-          , "--output", path.join(BUILD_PATH, executableName[process.platform])
+          , "--target", `node12-${paths.pkgPlatformMap[process.platform]}-${argv.arch}`
+          , "--output", path.join(BUILD_PATH, executableName)
         ]);
 
         fs.copySync(path.join(MDNS_BINDING_PATH, MDNS_BINDING_NAME)
@@ -143,10 +138,9 @@ async function build () {
 
         fs.removeSync(path.join(BUILD_PATH, "src"));
 
-        manifest.path = argv.usePkg
-            ? path.join(DIST_PATH, executableName[process.platform])
-            : path.join(executablePath[process.platform]
-                      , executableName[process.platform]);
+        manifest.path = !argv.package && argv.usePkg
+            ? path.join(paths.DIST_PATH, executableName)
+            : path.join(executablePath, executableName);
     } else {
         let launcherPath = path.join(BUILD_PATH
               , meta.__applicationExecutableName);
@@ -176,12 +170,12 @@ NODE_PATH="${modulesDir}" node $(dirname $0)/src/main.js --__name $(basename $0)
             }
         }
 
-        manifest.path = path.join(DIST_PATH, path.basename(launcherPath));
+        manifest.path = path.join(paths.DIST_PATH, path.basename(launcherPath));
     }
 
 
     // Write app manifest
-    fs.writeFileSync(path.join(BUILD_PATH, manifestName)
+    fs.writeFileSync(path.join(BUILD_PATH, paths.MANIFEST_NAME)
           , JSON.stringify(manifest, null, 4));
 
 
@@ -205,10 +199,10 @@ NODE_PATH="${modulesDir}" node $(dirname $0)/src/main.js --__name $(basename $0)
           , spawnOptions);
 
         const selectorBundlePath = path.join(derivedDataPath
-              , "Build/Products/Release/", selectorExecutableName);
+              , "Build/Products/Release/", paths.SELECTOR_EXECUTABLE_NAME);
 
         fs.moveSync(selectorBundlePath
-              , path.join(BUILD_PATH, selectorExecutableName));
+              , path.join(BUILD_PATH, paths.SELECTOR_EXECUTABLE_NAME));
         fs.removeSync(derivedDataPath);
     }
 
@@ -224,16 +218,16 @@ NODE_PATH="${modulesDir}" node $(dirname $0)/src/main.js --__name $(basename $0)
             // Move installer to dist
             fs.moveSync(
                     path.join(BUILD_PATH, installerName)
-                  , path.join(DIST_PATH, path.basename(installerName))
+                  , path.join(paths.DIST_PATH, path.basename(installerName))
                   , { overwrite: true });
         }
     } else {
         // Move tsc output and launcher to dist
-        fs.moveSync(BUILD_PATH, DIST_PATH, { overwrite: true });
+        fs.moveSync(BUILD_PATH, paths.DIST_PATH, { overwrite: true });
         /*
         spawnSync("npm install --production", {
             ...spawnOptions
-          , cwd: DIST_PATH
+          , cwd: paths.DIST_PATH
         });
         */
     }
@@ -249,9 +243,12 @@ NODE_PATH="${modulesDir}" node $(dirname $0)/src/main.js --__name $(basename $0)
 async function packageApp (platform, arch) {
     const packageFunctionArgs = [
         arch
-      , executableName[platform] // platformExecutableName
-      , executablePath[platform] // platformExecutablePath
-      , manifestPath[platform]   // platformManifestPath
+        // platformExecutableName
+      , paths.getExecutableName(platform, arch)
+        // platformExecutablePath
+      , paths.getExecutablePath(platform, arch)
+        // platformManifestPath
+      , paths.getManifestPath(platform, arch, argv.packageType)
     ];
 
     switch (platform) {
@@ -322,13 +319,13 @@ function packageDarwin (
           , path.join(rootExecutablePath, platformExecutableName));
     fs.moveSync(path.join(BUILD_PATH, MDNS_BINDING_NAME)
           , path.join(rootExecutablePath, MDNS_BINDING_NAME));
-    fs.moveSync(path.join(BUILD_PATH, manifestName)
-          , path.join(rootManifestPath, manifestName));
+    fs.moveSync(path.join(BUILD_PATH, paths.MANIFEST_NAME)
+          , path.join(rootManifestPath, paths.MANIFEST_NAME));
 
     if (process.platform === "darwin" && !argv.skipNativeBuilds) {
         // Move selector executable alongside main executable
-        fs.moveSync(path.join(BUILD_PATH, selectorExecutableName)
-              , path.join(rootExecutablePath, selectorExecutableName));
+        fs.moveSync(path.join(BUILD_PATH, paths.SELECTOR_EXECUTABLE_NAME)
+              , path.join(rootExecutablePath, paths.SELECTOR_EXECUTABLE_NAME));
     }
 
 
@@ -337,7 +334,7 @@ function packageDarwin (
 
     const view = {
         applicationName: meta.__applicationName
-      , manifestName
+      , manifestName: paths.MANIFEST_NAME
       , componentName
       , packageId: `tf.matt.${meta.__applicationName}`
       , executablePath: platformExecutablePath
@@ -406,15 +403,12 @@ function packageLinuxDeb (
     fs.ensureDirSync(rootManifestPath, { recursive: true });
 
     // Move files to root
-    fs.moveSync(
-            path.join(BUILD_PATH, platformExecutableName)
+    fs.moveSync(path.join(BUILD_PATH, platformExecutableName)
           , path.join(rootExecutablePath, platformExecutableName));
-    fs.moveSync(
-            path.join(BUILD_PATH, MDNS_BINDING_NAME)
+    fs.moveSync(path.join(BUILD_PATH, MDNS_BINDING_NAME)
           , path.join(rootExecutablePath, MDNS_BINDING_NAME));
-    fs.moveSync(
-            path.join(BUILD_PATH, manifestName)
-          , path.join(rootManifestPath, manifestName));
+    fs.moveSync(path.join(BUILD_PATH, paths.MANIFEST_NAME)
+          , path.join(rootManifestPath, paths.MANIFEST_NAME));
 
     const controlDir = path.join(__dirname, "../packaging/linux/deb/DEBIAN/");
     const controlOutputDir = path.join(rootPath, path.basename(controlDir));
@@ -474,7 +468,7 @@ function packageLinuxRpm (
       , executablePath: platformExecutablePath
       , manifestPath: platformManifestPath
       , executableName: platformExecutableName
-      , manifestName
+      , manifestName: paths.MANIFEST_NAME
       , bindingName: MDNS_BINDING_NAME
     };
 
@@ -483,18 +477,17 @@ function packageLinuxRpm (
                 fs.readFileSync(specPath).toString()
               , view));
 
-    const archMap = {
+    const rpmArchMap = {
         "x86": "i386"
       , "x64": "x86_64"
     };
 
-    // TODO: Use argv.arch
     spawnSync(`
         rpmbuild -bb ${specOutputPath} \
                  --define "_distdir ${BUILD_PATH}" \
                  --define "_rpmdir ${BUILD_PATH}" \
                  --define "_rpmfilename ${outputName}" \
-                 --target=${archMap[arch]}-linux`
+                 --target=${rpmArchMap[arch]}-linux`
           , spawnOptions);
 
     return outputName;
@@ -524,11 +517,11 @@ function packageWin32 (
       , applicationVersion: meta.__applicationVersion
       , executableName: platformExecutableName
       , executablePath: platformExecutablePath
-      , manifestName
+      , manifestName: paths.MANIFEST_NAME
       , bindingName: MDNS_BINDING_NAME
-      , winRegistryKey: WIN_REGISTRY_KEY
+      , winRegistryKey: paths.REGISTRY_KEY
       , outputName
-      , licensePath: LICENSE_PATH
+      , licensePath: paths.LICENSE_PATH
 
         // Uninstaller keys
       , registryPublisher: author
@@ -541,14 +534,8 @@ function packageWin32 (
                 fs.readFileSync(scriptPath).toString()
               , view));
 
-
-    const output = makensis.compileSync(scriptOutputPath);
-
-    if (output.status === 0) {
-        console.log(output.stdout);
-    } else {
-        console.error(output.stderr);
-    }
+    spawnSync(`makensis /DARCH=${arch} ${scriptOutputPath}`
+          , spawnOptions);
 
     return outputName;
 }
diff --git a/app/bin/install-manifest.js b/app/bin/install-manifest.js
index daab793..4cdb4b3 100644
--- a/app/bin/install-manifest.js
+++ b/app/bin/install-manifest.js
@@ -3,10 +3,7 @@ const os = require("os");
 const path = require("path");
 const minimist = require("minimist");
 
-const { manifestName
-      , manifestPath
-      , DIST_PATH
-      , WIN_REGISTRY_KEY } = require("./lib/paths");
+const paths = require("./lib/paths");
 
 
 const argv = minimist(process.argv.slice(2), {
@@ -17,7 +14,7 @@ const argv = minimist(process.argv.slice(2), {
 });
 
 
-const CURRENT_MANIFEST_PATH = path.join(DIST_PATH, manifestName);
+const CURRENT_MANIFEST_PATH = path.join(paths.DIST_PATH, paths.MANIFEST_NAME);
 
 
 if (!fs.existsSync(CURRENT_MANIFEST_PATH) && !argv.remove) {
@@ -27,6 +24,7 @@ if (!fs.existsSync(CURRENT_MANIFEST_PATH) && !argv.remove) {
 
 
 const platform = os.platform();
+const arch = os.arch();
 
 switch (platform) {
     case "darwin":
@@ -34,24 +32,24 @@ switch (platform) {
         // Manifest location within home directory
         const destination = path.join(os.homedir(), platform === "linux"
             ? ".mozilla/native-messaging-hosts/"
-            : manifestPath[platform]);
+            : paths.getManifestPath(platform, arch));
 
         if (argv.remove) {
-            fs.remove(path.join(destination, manifestName));
+            fs.remove(path.join(destination, paths.MANIFEST_NAME));
             break;
         }
 
         // Install manifest
         fs.ensureDirSync(destination);
         fs.copyFileSync(CURRENT_MANIFEST_PATH
-              , path.join(destination, manifestName));
+              , path.join(destination, paths.MANIFEST_NAME));
 
         break;
     };
 
     case "win32": {
         const { Registry } = require("rage-edit");
-        const REGISTRY_PATH = `HKCU\\SOFTWARE\\Mozilla\\NativeMessagingHosts\\${WIN_REGISTRY_KEY}`;
+        const REGISTRY_PATH = `HKCU\\SOFTWARE\\Mozilla\\NativeMessagingHosts\\${paths.REGISTRY_KEY}`;
 
         if (argv.remove) {
             Registry.delete(REGISTRY_PATH);
diff --git a/app/bin/lib/paths.js b/app/bin/lib/paths.js
index bbf4863..a21430b 100644
--- a/app/bin/lib/paths.js
+++ b/app/bin/lib/paths.js
@@ -1,3 +1,5 @@
+"use strict";
+
 const path = require("path");
 
 const { __applicationName
@@ -9,35 +11,65 @@ const rootPath = path.join(__dirname, "../../../");
 
 exports.DIST_PATH = path.join(rootPath, "dist/app");
 exports.LICENSE_PATH = path.join(rootPath, "LICENSE");
-exports.WIN_REGISTRY_KEY = __applicationName;
 
-exports.executableName = {
-    win32: `${__applicationExecutableName}.exe`
-  , darwin: __applicationExecutableName
-  , linux: __applicationExecutableName
-};
+exports.REGISTRY_KEY = __applicationName;
 
-exports.executablePath = {
-    win32: `C:\\Program Files\\${__applicationDirectoryName}\\`
-  , darwin: `/Library/Application Support/${__applicationDirectoryName}/`
-  , linux: `/opt/${__applicationDirectoryName}/`
-};
-
-exports.manifestName = `${__applicationName}.json`;
-
-exports.manifestPath = {
-    win32: `C:\\Program Files\\${__applicationDirectoryName}\\`
-  , darwin: "/Library/Application Support/Mozilla/NativeMessagingHosts/"
-  , linux: {
-        deb: "/usr/lib/mozilla/native-messaging-hosts/"
-      , rpm: "/usr/lib64/mozilla/native-messaging-hosts/"
-    }
-};
-
-exports.selectorExecutableName = "fx_cast_selector.app";
-
-exports.pkgPlatform = {
+exports.pkgPlatformMap = {
     win32: "win"
   , darwin: "macos"
   , linux: "linux"
 };
+
+exports.MANIFEST_NAME = `${__applicationName}.json`;
+exports.SELECTOR_EXECUTABLE_NAME = "fx_cast_selector.app";
+
+exports.getExecutableName = platform => {
+    switch (platform) {
+        case "win32":
+            return `${__applicationExecutableName}.exe`;
+        case "darwin":
+        case "linux":
+            return __applicationExecutableName;
+    }
+}
+
+exports.getExecutablePath = (platform, arch) => {
+    const EXECUTABLE_PATH_WIN32_X64 = `C:\\Program Files\\${__applicationDirectoryName}\\`;
+    const EXECUTABLE_PATH_WIN32_X86 = `C:\\Program Files (x86)\\${__applicationDirectoryName}\\`;
+    const EXECUTABLE_PATH_DARWIN = `/Library/Application Support/${__applicationDirectoryName}/`;
+    const EXECUTABLE_PATH_LINUX = `/opt/${__applicationDirectoryName}/`;
+
+    switch (platform) {
+        case "win32":
+            switch (arch) {
+                case "x86": return EXECUTABLE_PATH_WIN32_X86;
+                case "x64": return EXECUTABLE_PATH_WIN32_X64;
+            }
+            break;
+        case "darwin": return EXECUTABLE_PATH_DARWIN;
+        case "linux":  return EXECUTABLE_PATH_LINUX;
+    }
+};
+
+exports.getManifestPath = (platform, arch, linuxPackageType) => {
+    const MANIFEST_PATH_DARWIN = "/Library/Application Support/Mozilla/NativeMessagingHosts/";
+    const MANIFEST_PATH_LINUX_DEB = "/usr/lib/mozilla/native-messaging-hosts/";
+    const MANIFEST_PATH_LINUX_RPM ="/usr/lib64/mozilla/native-messaging-hosts/";
+
+    switch (platform) {
+        case "win32":
+            switch (arch) {
+                case "x86":
+                case "x64": return exports.getExecutablePath(platform, arch);
+            }
+            break;
+        case "darwin": return MANIFEST_PATH_DARWIN;
+        case "linux":
+            switch (linuxPackageType) {
+                case "deb": return MANIFEST_PATH_LINUX_DEB;
+                case "rpm": return MANIFEST_PATH_LINUX_RPM;
+            }
+
+            break;
+    }
+};
diff --git a/app/package-lock.json b/app/package-lock.json
index 9bd3b1f..3bd2568 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -121,12 +121,6 @@
                 "fastq": "^1.6.0"
             }
         },
-        "@nsis/language-data": {
-            "version": "0.7.4",
-            "resolved": "https://registry.npmjs.org/@nsis/language-data/-/language-data-0.7.4.tgz",
-            "integrity": "sha512-BJKOrBzGrgEzBA7nnNeDu5XNNOMABt+uVXi8UslM1cox3RRqYLBuOGWiF0SwLlP7CjmxIldQuGyhI8rGFxcDPw==",
-            "dev": true
-        },
         "@protobufjs/aspromise": {
             "version": "1.1.2",
             "resolved": "https://registry.npmjs.org/@protobufjs/aspromise/-/aspromise-1.1.2.tgz",
@@ -887,15 +881,6 @@
             "resolved": "https://registry.npmjs.org/long/-/long-4.0.0.tgz",
             "integrity": "sha512-XsP+KhQif4bjX1kbuSiySJFNAehNxgLb6hPRGJ9QsUr8ajHkuXGdrHmFUTUUXhDwVX2R5bY4JNZEwbUiMhV+MA=="
         },
-        "makensis": {
-            "version": "0.20.3",
-            "resolved": "https://registry.npmjs.org/makensis/-/makensis-0.20.3.tgz",
-            "integrity": "sha512-SUxlKgorrDXfoBlfkIj1IeihvNfEEJR7oBA1RdSo7LYJKXVJHLqS++TEMaq/XKmWbYW6NowJ+jzH+o0eJanRHQ==",
-            "dev": true,
-            "requires": {
-                "@nsis/language-data": "^0.7.2"
-            }
-        },
         "mdns": {
             "version": "2.5.1",
             "resolved": "https://registry.npmjs.org/mdns/-/mdns-2.5.1.tgz",
diff --git a/app/package.json b/app/package.json
index 660aea6..35cd706 100644
--- a/app/package.json
+++ b/app/package.json
@@ -25,7 +25,6 @@
         "@types/mime-types": "^2.1.0",
         "@types/node": "^13.13.15",
         "@types/node-fetch": "^2.5.7",
-        "makensis": "^0.20.3",
         "mustache": "^4.0.1",
         "pkg": "^4.4.9",
         "tslint": "^6.1.3"
diff --git a/app/packaging/win/installer.nsi b/app/packaging/win/installer.nsi
index aa26839..fab691c 100644
--- a/app/packaging/win/installer.nsi
+++ b/app/packaging/win/installer.nsi
@@ -92,11 +92,16 @@ Section
                 $(MSG__INSTALL_BONJOUR) \
                 IDNO skipInstallBonjour
 
-            File /oname=Bonjour64.msi "C:\Program Files\Bonjour SDK\Installer\Bonjour64.msi"
-            ExecWait "msiexec /i $\"$INSTDIR\Bonjour64.msi$\""
+            ${If} ${ARCH} == "x86"
+                File /oname=Bonjour.msi "C:\Program Files\Bonjour SDK\Installer\Bonjour.msi"
+            ${ElseIf} ${ARCH} == "x64"
+                File /oname=Bonjour.msi "C:\Program Files\Bonjour SDK\Installer\Bonjour64.msi"
+            ${EndIf}
+
+            ExecWait "msiexec /i $\"$INSTDIR\Bonjour.msi$\""
 
     skipInstallBonjour:
-    Delete "$INSTDIR\Bonjour64.msi"
+    Delete "$INSTDIR\Bonjour.msi"
 
     # Native manifest key
     WriteRegStr HKLM "${KEY_MANIFEST}" "" "$INSTDIR\{{manifestName}}"