diff --git a/web/pdf_thumbnail_view.js b/web/pdf_thumbnail_view.js
index 1294d35542632e..3a62f5dbb50926 100644
--- a/web/pdf_thumbnail_view.js
+++ b/web/pdf_thumbnail_view.js
@@ -238,6 +238,11 @@ var PDFThumbnailView = (function PDFThumbnailViewClosure() {
           rejectRenderPromise(error);
           return;
         }
+
+        self.image.src = self.canvas.toDataURL();
+        self.canvas.width = 0;
+        self.canvas.height = 0;
+        delete self.canvas;
         self.renderingState = RenderingStates.FINISHED;
 
         if (!error) {