diff --git a/gulpfile.mjs b/gulpfile.mjs
index fb6779a97..d6d67742f 100644
--- a/gulpfile.mjs
+++ b/gulpfile.mjs
@@ -84,7 +84,7 @@ const ENV_TARGETS = [
   "last 2 versions",
   "Chrome >= 98",
   "Firefox ESR",
-  "Safari >= 15.4",
+  "Safari >= 16.4",
   "Node >= 18",
   "> 1%",
   "not IE > 0",
diff --git a/src/core/writer.js b/src/core/writer.js
index 99fa65555..417f1d566 100644
--- a/src/core/writer.js
+++ b/src/core/writer.js
@@ -67,10 +67,7 @@ async function writeStream(stream, buffer, transform) {
   // The number 256 is arbitrary, but it should be reasonable.
   const MIN_LENGTH_FOR_COMPRESSING = 256;
 
-  if (
-    typeof CompressionStream !== "undefined" &&
-    (bytes.length >= MIN_LENGTH_FOR_COMPRESSING || isFilterZeroFlateDecode)
-  ) {
+  if (bytes.length >= MIN_LENGTH_FOR_COMPRESSING || isFilterZeroFlateDecode) {
     try {
       const cs = new CompressionStream("deflate");
       const writer = cs.writable.getWriter();
diff --git a/web/app.js b/web/app.js
index 3c6457459..048707c11 100644
--- a/web/app.js
+++ b/web/app.js
@@ -399,9 +399,6 @@ const PDFViewerApplication = {
     const container = appConfig.mainContainer,
       viewer = appConfig.viewerContainer;
     const annotationEditorMode = AppOptions.get("annotationEditorMode");
-    const isOffscreenCanvasSupported =
-      AppOptions.get("isOffscreenCanvasSupported") &&
-      FeatureTest.isOffscreenCanvasSupported;
     const pageColors =
       AppOptions.get("forcePageColors") ||
       window.matchMedia("(forced-colors: active)").matches
@@ -478,7 +475,7 @@ const PDFViewerApplication = {
 
     if (appConfig.annotationEditorParams) {
       if (annotationEditorMode !== AnnotationEditorType.DISABLE) {
-        if (AppOptions.get("enableStampEditor") && isOffscreenCanvasSupported) {
+        if (AppOptions.get("enableStampEditor")) {
           appConfig.toolbar?.editorStampButton?.classList.remove("hidden");
         }