Show win32 is installer_arch is missing

Author: bluewave41

media/css/protocol/components/_download-button.scss

@@ -101,20 +101,16 @@ ul.download-list {
     display: block !important;
 }
 
-// 64-bit UA detection for Firefox on Windows (issue #8635)
-.windows.x64 .download-button .os_win {
+.force-win64.windows .download-button .os_win,
+.force-win64-aarch64.windows .download-button .os_win {
     display: none !important;
 }
 
-.windows.x64 .download-button .os_win64 {
+.force-win64 .os_win64 {
     display: block !important;
 }
 
-.windows.aarch64 .download-button .os_win {
-    display: none !important;
-}
-
-.windows.aarch64 .download-button .os_win64-aarch64 {
+.force-win64-aarch64 .os_win64-aarch64 {
     display: block !important;
 }
 

media/js/base/site.js

@@ -147,7 +147,7 @@
                 }
 
                 if (forcedArchitecture !== undefined) {
-                    archSize = forcedArchitecture === 'win' ? 32 : 64;
+                    classString += ' force-' + forcedArchitecture;
                 }
             } else {
                 classString = classString.replace('windows', platform);
@@ -162,12 +162,6 @@
                 }
             }
 
-            if (
-                platform === 'windows' &&
-                forcedArchitecture === 'win64-aarch64'
-            ) {
-                classString += ' aarch64';
-            }
             // Used for 64bit download link on Linux and Firefox Beta on Windows.
             else if (archSize === 64) {
                 classString += ' x64';