diff --git a/devtools/server/actors/utils/source-url.js b/devtools/server/actors/utils/source-url.js
index b291a4182044..34e6b02272be 100644
--- a/devtools/server/actors/utils/source-url.js
+++ b/devtools/server/actors/utils/source-url.js
@@ -26,8 +26,7 @@ function getDebuggerSourceURL(source) {
     introType === "debugger eval" ||
     introType === "Function" ||
     introType === "eventHandler" ||
-    introType === "setTimeout" ||
-    introType === "setInterval"
+    introType === "domTimer"
   ) {
     return null;
   }
diff --git a/dom/base/nsGlobalWindowInner.cpp b/dom/base/nsGlobalWindowInner.cpp
index 4d49899cafad..65fe55ff3aeb 100644
--- a/dom/base/nsGlobalWindowInner.cpp
+++ b/dom/base/nsGlobalWindowInner.cpp
@@ -5744,6 +5744,7 @@ bool WindowScriptTimeoutHandler::Call(const char* aExecutionReason) {
   JS::CompileOptions options(aes.cx());
   options.setFileAndLine(mFileName.get(), mLineNo);
   options.setNoScriptRval(true);
+  options.setIntroductionType("domTimer");
   JS::Rooted<JSObject*> global(aes.cx(), mGlobal->GetGlobalJSObject());
   {
     nsJSUtils::ExecutionContext exec(aes.cx(), global);
diff --git a/dom/workers/WorkerScope.cpp b/dom/workers/WorkerScope.cpp
index 8bd8ab2eac50..a748e652a5b1 100644
--- a/dom/workers/WorkerScope.cpp
+++ b/dom/workers/WorkerScope.cpp
@@ -95,6 +95,7 @@ bool WorkerScriptTimeoutHandler::Call(const char* aExecutionReason) {
   JSContext* cx = aes.cx();
   JS::CompileOptions options(cx);
   options.setFileAndLine(mFileName.get(), mLineNo).setNoScriptRval(true);
+  options.setIntroductionType("domTimer");
 
   JS::Rooted<JS::Value> unused(cx);
   JS::SourceText<char16_t> srcBuf;
diff --git a/js/src/doc/Debugger/Debugger.Source.md b/js/src/doc/Debugger/Debugger.Source.md
index 9ff5d257af2a..c9603bd89323 100644
--- a/js/src/doc/Debugger/Debugger.Source.md
+++ b/js/src/doc/Debugger/Debugger.Source.md
@@ -205,9 +205,7 @@ one of the following values:
 
 * `"javascriptURL"`, for code presented in `javascript:` URLs.
 
-* `"setTimeout"`, for code passed to `setTimeout` as a string.
-
-* `"setInterval"`, for code passed to `setInterval` as a string.
+* `"domTimer"`, for code passed to `setTimeout`/`setInterval` as a string.
 
 * `undefined`, if the implementation doesn't know how the code was
   introduced.