diff -ruN a/src/cdogs/campaign_entry.c b/src/cdogs/campaign_entry.c
--- a/src/cdogs/campaign_entry.c
+++ b/src/cdogs/campaign_entry.c
@@ -30,7 +30,6 @@
 
 #include <stdio.h>
 
-#include <cdogs/cwolfmap/cwolfmap.h>
 #include <cdogs/files.h>
 #include <cdogs/map_new.h>
 #include <cdogs/map_wolf.h>
@@ -48,20 +47,7 @@
 	{
 		return ScanCampaignOld(path, title, numMissions) == 0;
 	}
-	int spearMission = 1;
-	char buf[CDOGS_PATH_MAX];
-	if (path[strlen(path)-2] == '?')
-	{
-		spearMission = atoi(&path[strlen(path) - 1]);
-		strcpy(buf, path);
-		buf[strlen(buf) - 2] = '\0';
-		path = buf;
-	}
-	if (CWGetType(path, NULL, NULL, spearMission) != CWMAPTYPE_UNKNOWN)
-	{
-		return MapWolfScan(path, spearMission, title, numMissions) == 0;
-	}
-	
+	// The Wolfenstein 3D map importer is not part of this build (see map_wolf_stub.c).
 	return false;
 }
 
diff -ruN a/src/cdogs/map_new.c b/src/cdogs/map_new.c
--- a/src/cdogs/map_new.c
+++ b/src/cdogs/map_new.c
@@ -31,7 +31,6 @@
 #include <locale.h>
 #include <stdio.h>
 
-#include "cwolfmap/cwolfmap.h"
 #include "door.h"
 #include "files.h"
 #include "json_utils.h"
@@ -101,19 +100,7 @@
 		return MapNewLoadArchive(filename, c);
 	}
 
-	int spearMission = 1;
-	char buf[CDOGS_PATH_MAX];
-	if (filename[strlen(filename) - 2] == '?')
-	{
-		spearMission = atoi(&filename[strlen(filename) - 1]);
-		strcpy(buf, filename);
-		buf[strlen(buf) - 2] = '\0';
-		filename = buf;
-	}
-	if (CWGetType(filename, NULL, NULL, spearMission) != CWMAPTYPE_UNKNOWN)
-	{
-		return MapWolfLoad(filename, spearMission, c);
-	}
+	// The Wolfenstein 3D map importer is not part of this build (see map_wolf_stub.c).
 
 	// try to load the new map format
 	json_t *root = NULL;
diff -ruN a/src/game_loop.c b/src/game_loop.c
--- a/src/game_loop.c
+++ b/src/game_loop.c
@@ -100,7 +100,8 @@
 	if (emscripten_fs_ready)
 		return true;
 
-	if (emscripten_run_script_int("Module.syncdone") == 1)
+	// EM_ASM_INT, not emscripten_run_script_int: the page forbids eval() (Content Security Policy).
+	if (EM_ASM_INT({ return Module.syncdone ? 1 : 0; }) == 1)
 	{
 		FILE *config_file = fopen(GetConfigFilePath(CONFIG_FILE), "r");
 		if (config_file == NULL)