foo.diff

diff --git a/devtools/client/debugger/src/actions/navigation.js b/devtools/client/debugger/src/actions/navigation.js
index 1f8a0eb2e423..dd60da7c6794 100644
--- a/devtools/client/debugger/src/actions/navigation.js
+++ b/devtools/client/debugger/src/actions/navigation.js
@@ -48,14 +48,20 @@ export function willNavigate(event: Object) {
   };
 }
 
-export function connect(url: string, actor: string, canRewind: boolean) {
+export function connect(
+  url: string,
+  actor: string,
+  canRewind: boolean,
+  isWebExtension: boolean
+) {
   return async function({ dispatch }: ThunkArgs) {
     await dispatch(updateWorkers());
     dispatch(
       ({
         type: "CONNECT",
         mainThread: { url, actor, type: -1, name: "" },
-        canRewind
+        canRewind,
+        isWebExtension
       }: Action)
     );
   };
diff --git a/devtools/client/debugger/src/client/firefox.js b/devtools/client/debugger/src/client/firefox.js
index 5cbd6b0bba5d..e849a0fa0244 100644
--- a/devtools/client/debugger/src/client/firefox.js
+++ b/devtools/client/debugger/src/client/firefox.js
@@ -58,7 +58,8 @@ export async function onConnect(connection: any, actions: Object) {
   await actions.connect(
     tabTarget.url,
     threadClient.actor,
-    traits && traits.canRewind
+    traits && traits.canRewind,
+    tabTarget.isWebExtension
   );
   await actions.newGeneratedSources(sourceInfo);