fix(browser): Avoid showing browser extension error message in non-`w…

…indow` global scopes (#13156)

Relax our browser extension detection check to
avoid showing the error message and blocking `Sentry.init` if the SDK is
not initialized in a `window` global scope. For instance, this will
allow `Sentry.init` to be executed in (service) workers. We likely don't
need to worry about multiple SDK instance collisions in non-`window`
global scopes.

packages/browser/src/sdk.ts

@@ -72,7 +72,12 @@ type Runtime = {
 };
 
 function shouldShowBrowserExtensionError(): boolean {
-  const windowWithMaybeExtension = WINDOW as typeof WINDOW & ExtensionProperties;
+  const windowWithMaybeExtension =
+    typeof WINDOW.window !== 'undefined' && (WINDOW as typeof WINDOW & ExtensionProperties);
+  if (!windowWithMaybeExtension) {
+    // No need to show the error if we're not in a browser window environment (e.g. service workers)
+    return false;
+  }
 
   const extensionKey = windowWithMaybeExtension.chrome ? 'chrome' : 'browser';
   const extensionObject = windowWithMaybeExtension[extensionKey];

packages/browser/test/sdk.test.ts

@@ -149,6 +149,7 @@ describe('init', () => {
       Object.defineProperty(WINDOW, 'chrome', { value: undefined, writable: true });
       Object.defineProperty(WINDOW, 'browser', { value: undefined, writable: true });
       Object.defineProperty(WINDOW, 'nw', { value: undefined, writable: true });
+      Object.defineProperty(WINDOW, 'window', { value: WINDOW, writable: true });
     });
 
     it('logs a browser extension error if executed inside a Chrome extension', () => {
@@ -229,6 +230,18 @@ describe('init', () => {
       consoleErrorSpy.mockRestore();
     });
 
+    it("doesn't log a browser extension error if the `window` object isn't defined", () => {
+      const consoleErrorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
+
+      Object.defineProperty(WINDOW, 'window', { value: undefined });
+
+      init(options);
+
+      expect(consoleErrorSpy).not.toHaveBeenCalled();
+
+      consoleErrorSpy.mockRestore();
+    });
+
     it("doesn't return a client on initialization error", () => {
       const consoleErrorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});