Reapply changes from facebook#22631

Author: Juan Tejada

packages/react-devtools-extensions/src/backend.js

@@ -13,16 +13,15 @@ function welcome(event) {
   ) {
     return;
   }
-  const extensionId = event.data.extensionId;
 
   window.removeEventListener('message', welcome);
 
-  setup(window.__REACT_DEVTOOLS_GLOBAL_HOOK__, extensionId);
+  setup(window.__REACT_DEVTOOLS_GLOBAL_HOOK__);
 }
 
 window.addEventListener('message', welcome);
 
-function setup(hook, extensionId) {
+function setup(hook) {
   if (hook == null) {
     // DevTools didn't get injected into this page (maybe b'c of the contentType).
     return;
@@ -56,7 +55,6 @@ function setup(hook, extensionId) {
         {
           source: 'react-devtools-bridge',
           payload: {event, payload},
-          extensionId,
         },
         '*',
         transferable,

packages/react-devtools-extensions/src/main.js

@@ -27,6 +27,7 @@ const LOCAL_STORAGE_SUPPORTS_PROFILING_KEY =
   'React::DevTools::supportsProfiling';
 
 const isChrome = getBrowserName() === 'Chrome';
+const isEdge = getBrowserName() === 'Edge';
 
 let panelCreated = false;
 
@@ -149,7 +150,7 @@ function createPanelIfReactLoaded() {
 
         store = new Store(bridge, {
           isProfiling,
-          supportsReloadAndProfile: isChrome,
+          supportsReloadAndProfile: isChrome || isEdge,
           supportsProfiling,
           // At this time, the scheduling profiler can only parse Chrome performance profiles.
           supportsSchedulingProfiler: isChrome,