diff --git a/script.js b/script.js
index 5c76c4f..30d3dfe 100644
--- a/script.js
+++ b/script.js
@@ -17,7 +17,7 @@ let config = {
 let pointers = [];
 let splatStack = [];
 
-const  { gl, ext, support_linear_float } = getWebGLContext(canvas);
+const  { gl, ext } = getWebGLContext(canvas);
 startGUI();
 
 function getWebGLContext (canvas) {
@@ -40,7 +40,7 @@ function getWebGLContext (canvas) {
     const internalFormat = isWebGL2 ? gl.RGBA16F : gl.RGBA;
     const internalFormatRG = isWebGL2 ? gl.RG16F : gl.RGBA;
     const formatRG = isWebGL2 ? gl.RG : gl.RGBA;
-    const texType = isWebGL2 ? gl.HALF_FLOAT : halfFloat.HALF_FLOAT_OES;
+    const halfFloatTexType = isWebGL2 ? gl.HALF_FLOAT : halfFloat.HALF_FLOAT_OES;
 
     return {
         gl,
@@ -48,9 +48,9 @@ function getWebGLContext (canvas) {
             internalFormat,
             internalFormatRG,
             formatRG,
-            texType
-        },
-        support_linear_float
+            halfFloatTexType,
+            support_linear_float
+        }
     };
 }
 
@@ -396,7 +396,7 @@ initFramebuffers();
 const clearProgram = new GLProgram(baseVertexShader, clearShader);
 const displayProgram = new GLProgram(baseVertexShader, displayShader);
 const splatProgram = new GLProgram(baseVertexShader, splatShader);
-const advectionProgram = new GLProgram(baseVertexShader, support_linear_float ? advectionShader : advectionManualFilteringShader);
+const advectionProgram = new GLProgram(baseVertexShader, ext.support_linear_float ? advectionShader : advectionManualFilteringShader);
 const divergenceProgram = new GLProgram(baseVertexShader, divergenceShader);
 const curlProgram = new GLProgram(baseVertexShader, curlShader);
 const vorticityProgram = new GLProgram(baseVertexShader, vorticityShader);
@@ -410,10 +410,10 @@ function initFramebuffers () {
     const iFormat = ext.internalFormat;
     const iFormatRG = ext.internalFormatRG;
     const formatRG = ext.formatRG;
-    const texType = ext.texType;
+    const texType = ext.halfFloatTexType;
 
-    density    = createDoubleFBO(0, textureWidth, textureHeight, iFormat  , gl.RGBA , texType, support_linear_float ? gl.LINEAR : gl.NEAREST);
-    velocity   = createDoubleFBO(2, textureWidth, textureHeight, iFormatRG, formatRG, texType, support_linear_float ? gl.LINEAR : gl.NEAREST);
+    density    = createDoubleFBO(0, textureWidth, textureHeight, iFormat  , gl.RGBA , texType, ext.support_linear_float ? gl.LINEAR : gl.NEAREST);
+    velocity   = createDoubleFBO(2, textureWidth, textureHeight, iFormatRG, formatRG, texType, ext.support_linear_float ? gl.LINEAR : gl.NEAREST);
     divergence = createFBO      (4, textureWidth, textureHeight, iFormatRG, formatRG, texType, gl.NEAREST);
     curl       = createFBO      (5, textureWidth, textureHeight, iFormatRG, formatRG, texType, gl.NEAREST);
     pressure   = createDoubleFBO(6, textureWidth, textureHeight, iFormatRG, formatRG, texType, gl.NEAREST);
@@ -435,6 +435,10 @@ function createFBO (texId, w, h, internalFormat, format, type, param) {
     gl.viewport(0, 0, w, h);
     gl.clear(gl.COLOR_BUFFER_BIT);
 
+    const status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
+    if (status != gl.FRAMEBUFFER_COMPLETE)
+        ga('send', 'event', 'app', 'init', status);
+
     return [texture, fbo, texId];
 }
 
@@ -449,7 +453,7 @@ function createDoubleFBO (texId, w, h, internalFormat, format, type, param) {
         get second () {
             return fbo2;
         },
-        swap: () => {
+        swap () {
             let temp = fbo1;
             fbo1 = fbo2;
             fbo2 = temp;
@@ -542,10 +546,10 @@ function update () {
     gl.uniform2f(pressureProgram.uniforms.texelSize, 1.0 / textureWidth, 1.0 / textureHeight);
     gl.uniform1i(pressureProgram.uniforms.uDivergence, divergence[2]);
     pressureTexId = pressure.first[2];
+    gl.uniform1i(pressureProgram.uniforms.uPressure, pressureTexId);
     gl.activeTexture(gl.TEXTURE0 + pressureTexId);
     for (let i = 0; i < config.PRESSURE_ITERATIONS; i++) {
         gl.bindTexture(gl.TEXTURE_2D, pressure.first[0]);
-        gl.uniform1i(pressureProgram.uniforms.uPressure, pressureTexId);
         blit(pressure.second[1]);
         pressure.swap();
     }