diff --git a/app/build.gradle b/app/build.gradle
index eb0e32bfa..f937ab87f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -169,6 +169,14 @@ android {
         }
     }
 
+    aaptOptions {
+        // All JavaScript code used internally by GeckoView is packaged in a
+        // file called omni.ja. If this file is compressed in the APK,
+        // GeckoView must uncompress it before it can do anything else which
+        // causes a significant delay on startup.
+        noCompress 'ja'
+    }
+
     testOptions {
         execution 'ANDROIDX_TEST_ORCHESTRATOR'
         unitTests.includeAndroidResources = true