diff --git a/toolkit/crashreporter/CrashSubmit.jsm b/toolkit/crashreporter/CrashSubmit.jsm
index fde213a96933..187a6ca6524b 100644
--- a/toolkit/crashreporter/CrashSubmit.jsm
+++ b/toolkit/crashreporter/CrashSubmit.jsm
@@ -227,7 +227,7 @@ Submitter.prototype = {
                    .createInstance(Ci.nsIDOMFormData);
     // add the data
     for (let [name, value] of Object.entries(this.extraKeyVals)) {
-      if (name != "ServerURL") {
+      if (name != "ServerURL" && name != "StackTraces") {
         formData.append(name, value);
       }
     }
diff --git a/toolkit/crashreporter/client/crashreporter.cpp b/toolkit/crashreporter/client/crashreporter.cpp
index de66f5e8f52f..69cb6b98cb4e 100644
--- a/toolkit/crashreporter/client/crashreporter.cpp
+++ b/toolkit/crashreporter/client/crashreporter.cpp
@@ -757,8 +757,9 @@ int main(int argc, char** argv)
     }
 
     string sendURL = queryParameters["ServerURL"];
-    // we don't need to actually send this
+    // we don't need to actually send these
     queryParameters.erase("ServerURL");
+    queryParameters.erase("StackTraces");
 
     queryParameters["Throttleable"] = "1";