docs: reference to hosted trace viewer (microsoft#10515)

Author: mxschmitt

docs/src/trace-viewer.md

@@ -3,7 +3,7 @@ id: trace-viewer
 title: "Trace Viewer"
 ---
 
-Playwright Trace Viewer is a GUI tool that helps exploring recorded Playwright traces after the script ran.
+Playwright Trace Viewer is a GUI tool that helps exploring recorded Playwright traces after the script ran. Open traces [locally](#viewing-the-trace) or in your browser on [`trace.playwright.dev`](https://trace.playwright.dev).
 
 <img width="1212" alt="Playwright Trace Viewer" src="https://user-images.githubusercontent.com/883973/120585896-6a1bca80-c3e7-11eb-951a-bd84002480f5.png"></img>
 
@@ -136,7 +136,7 @@ This will record the trace and place it into the file named `trace.zip`.
 
 ## Viewing the trace
 
-You can open the saved trace using Playwright CLI:
+You can open the saved trace using Playwright CLI or in your browser on [`trace.playwright.dev`](https://trace.playwright.dev).
 
 ```bash js
 npx playwright show-trace trace.zip