diff --git a/README.md b/README.md
index dd97bcb7..20f9486e 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ The Visual Studio and Xcode project files are not supported.
 
 ## Discussion
 
-  * [Discord (Clover.moe Community)](https://discord.gg/7J2pjGD)
+  * [Discussion / Technical support](https://clover.moe/open-source)
 
 
 ## License
diff --git a/code/qcommon/common.c b/code/qcommon/common.c
index ce08bac1..90f4e0c2 100644
--- a/code/qcommon/common.c
+++ b/code/qcommon/common.c
@@ -2748,7 +2748,14 @@ void Com_Init( char *commandLine ) {
 	// init commands and vars
 	//
 	com_altivec = Cvar_Get ("com_altivec", "1", CVAR_ARCHIVE);
+#ifdef __EMSCRIPTEN__
+	// Under Emscripten the browser handles throttling the frame rate.
+	// Manual framerate throttling interacts poorly with Emscripten's
+	// browser-driven event loop. So default throttling to off.
+	com_maxfps = Cvar_Get ("com_maxfps", "0", CVAR_ARCHIVE);
+#else
 	com_maxfps = Cvar_Get ("com_maxfps", "85", CVAR_ARCHIVE);
+#endif
 	com_blood = Cvar_Get ("com_blood", "1", CVAR_ARCHIVE);
 
 	com_logfile = Cvar_Get ("logfile", "0", CVAR_TEMP );
diff --git a/code/renderergl1/tr_curve.c b/code/renderergl1/tr_curve.c
index eaabba46..c5c9d98d 100644
--- a/code/renderergl1/tr_curve.c
+++ b/code/renderergl1/tr_curve.c
@@ -306,13 +306,13 @@ srfGridMesh_t *R_CreateSurfaceGridMesh(int width, int height,
 	grid->heightLodError = /*ri.Hunk_Alloc*/ ri.Malloc( height * 4 );
 	Com_Memcpy( grid->heightLodError, errorTable[1], height * 4 );
 #else
-	grid = ri.Hunk_Alloc( size );
+	grid = ri.Hunk_Alloc( size, h_low );
 	Com_Memset(grid, 0, size);
 
-	grid->widthLodError = ri.Hunk_Alloc( width * 4 );
+	grid->widthLodError = ri.Hunk_Alloc( width * 4, h_low );
 	Com_Memcpy( grid->widthLodError, errorTable[0], width * 4 );
 
-	grid->heightLodError = ri.Hunk_Alloc( height * 4 );
+	grid->heightLodError = ri.Hunk_Alloc( height * 4, h_low );
 	Com_Memcpy( grid->heightLodError, errorTable[1], height * 4 );
 #endif
 
diff --git a/code/renderergl2/glsl/shadowmask_fp.glsl b/code/renderergl2/glsl/shadowmask_fp.glsl
index 2b57e3ba..56d480fb 100644
--- a/code/renderergl2/glsl/shadowmask_fp.glsl
+++ b/code/renderergl2/glsl/shadowmask_fp.glsl
@@ -103,14 +103,19 @@ void main()
 
 	vec4 shadowpos = u_ShadowMvp * biasPos;
 
+	if ( depth >= 1.0 - DEPTH_MAX_ERROR )
+	{
+		result = 1.0;
+	}
+	else
 #if defined(USE_SHADOW_CASCADE)
 	if (all(lessThan(abs(shadowpos.xyz), vec3(abs(shadowpos.w)))))
-	{
 #endif
+	{
 		shadowpos.xyz = shadowpos.xyz * (0.5 / shadowpos.w) + vec3(0.5);
 		result = PCF(u_ShadowMap, shadowpos.xy, shadowpos.z);
-#if defined(USE_SHADOW_CASCADE)
 	}
+#if defined(USE_SHADOW_CASCADE)
 	else
 	{
 		shadowpos = u_ShadowMvp2 * biasPos;
diff --git a/code/renderergl2/tr_curve.c b/code/renderergl2/tr_curve.c
index d175789b..54910d04 100644
--- a/code/renderergl2/tr_curve.c
+++ b/code/renderergl2/tr_curve.c
@@ -388,10 +388,10 @@ void R_CreateSurfaceGridMesh(srfBspSurface_t *grid, int width, int height,
 	grid->numVerts = (width * height);
 	grid->verts = ri.Malloc(grid->numVerts * sizeof(srfVert_t));
 #else
-	grid->widthLodError = ri.Hunk_Alloc( width * 4 );
+	grid->widthLodError = ri.Hunk_Alloc( width * 4, h_low );
 	Com_Memcpy( grid->widthLodError, errorTable[0], width * 4 );
 
-	grid->heightLodError = ri.Hunk_Alloc( height * 4 );
+	grid->heightLodError = ri.Hunk_Alloc( height * 4, h_low );
 	Com_Memcpy( grid->heightLodError, errorTable[1], height * 4 );
 
 	grid->numIndexes = numIndexes;
diff --git a/code/renderergl2/tr_init.c b/code/renderergl2/tr_init.c
index 8019c3a2..3d5bee60 100644
--- a/code/renderergl2/tr_init.c
+++ b/code/renderergl2/tr_init.c
@@ -1375,8 +1375,15 @@ void R_Register( void )
 	r_dlightBacks = ri.Cvar_Get( "r_dlightBacks", "1", CVAR_ARCHIVE );
 	r_finish = ri.Cvar_Get ("r_finish", "0", CVAR_ARCHIVE);
 	r_textureMode = ri.Cvar_Get( "r_textureMode", "GL_LINEAR_MIPMAP_LINEAR", CVAR_ARCHIVE );
+#ifdef __EMSCRIPTEN__
+	// Under Emscripten we don't throttle framerate with com_maxfps by default, so enable
+	// vsync by default instead.
+	r_swapInterval = ri.Cvar_Get( "r_swapInterval", "1",
+					CVAR_ARCHIVE | CVAR_LATCH );
+#else
 	r_swapInterval = ri.Cvar_Get( "r_swapInterval", "0",
 					CVAR_ARCHIVE | CVAR_LATCH );
+#endif
 	r_gamma = ri.Cvar_Get( "r_gamma", "1", CVAR_ARCHIVE );
 	r_facePlaneCull = ri.Cvar_Get ("r_facePlaneCull", "1", CVAR_ARCHIVE );
 
diff --git a/code/sdl/sdl_glimp.c b/code/sdl/sdl_glimp.c
index 2678dc71..5ce1e47d 100644
--- a/code/sdl/sdl_glimp.c
+++ b/code/sdl/sdl_glimp.c
@@ -438,10 +438,11 @@ static int GLimp_SetMode(int mode, qboolean fullscreen, qboolean noborder, qbool
 		if( display < 0 )
 		{
 			ri.Printf( PRINT_DEVELOPER, "SDL_GetWindowDisplayIndex() failed: %s\n", SDL_GetError() );
+			display = 0;
 		}
 	}
 
-	if( display >= 0 && SDL_GetDesktopDisplayMode( display, &desktopMode ) == 0 )
+	if( SDL_GetDesktopDisplayMode( display, &desktopMode ) == 0 )
 	{
 		displayAspect = (float)desktopMode.w / (float)desktopMode.h;