diff --git a/.gitignore b/.gitignore
index 45cd624a..5f06e6ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,7 @@ mudclient.data
 mudclient.html
 mudclient.js
 mudclient.wasm
+mudclient.wasm.js
 .idea
 options.ini
 rsc-c.3dsx
diff --git a/Makefile.emscripten b/Makefile.emscripten
index 7b0e07f7..ef40c10f 100644
--- a/Makefile.emscripten
+++ b/Makefile.emscripten
@@ -44,7 +44,7 @@ CFLAGS += -s DISABLE_EXCEPTION_THROWING=1
 
 LDFLAGS += -s INITIAL_MEMORY=50MB -s ALLOW_MEMORY_GROWTH=1 -s USE_SDL=2
 LDFLAGS += -s ASYNCIFY -s ASYNCIFY_STACK_SIZE=16384
-LDFLAGS += -s MIN_FIREFOX_VERSION=52
+LDFLAGS += -s MIN_FIREFOX_VERSION=68
 
 LDFLAGS += --preload-file ./cache/
 
diff --git a/src/options.c b/src/options.c
index 6e79dc9a..ced3911e 100644
--- a/src/options.c
+++ b/src/options.c
@@ -228,7 +228,8 @@ void options_save(Options *options) {
         return;
     }
 
-    char file_buffer[65536] = {0};
+    int file_length = UINT16_MAX + 1;
+    char *file_buffer = calloc(1, file_length);
 
     sprintf(file_buffer, OPTIONS_INI_TEMPLATE,
             options->members,               //
@@ -306,7 +307,7 @@ void options_save(Options *options) {
     );
 
 #ifdef ANDROID
-    if (SDL_RWwrite(ini_file, file_buffer, strlen(file_buffer) + 1, 1) < 1) {
+    if (SDL_RWwrite(ini_file, file_buffer, file_length, 1) < 1) {
         mud_error("failed to write options.ini file %s\n", SDL_GetError());
     }
 
@@ -314,9 +315,10 @@ void options_save(Options *options) {
         mud_error("failed to close options.ini file %s\n", SDL_GetError());
     }
 #else
-    fwrite(file_buffer, strlen(file_buffer) + 1, 1, ini_file);
+    fwrite(file_buffer, file_length, 1, ini_file);
     fclose(ini_file);
 #endif
+    free(file_buffer);
 
 #ifdef OPTIONS_UNIX
     /* restrict access to potentially sensitive info */
diff --git a/src/surface.h b/src/surface.h
index 03c83e5c..abfb4936 100644
--- a/src/surface.h
+++ b/src/surface.h
@@ -229,6 +229,8 @@ void surface_new(Surface *surface, int width, int height, int limit,
                  mudclient *mud);
 
 #if defined(RENDER_GL) || defined(RENDER_3DS_GL)
+void surface_gl_new(Surface *surface, int width, int height, int limit,
+                    mudclient *mud);
 float surface_gl_translate_x(Surface *surface, int x);
 float surface_gl_translate_y(Surface *surface, int y);
 void surface_gl_reset_context(Surface *surface);