DevTools now 'untrack' Fibers (cleans up the ID-to-Fiber mapping) after a slight delay in order to support a Fast Refresh edge case:
1. Component type is updated and Fast Refresh schedules an update+remount.
2. flushPendingErrorsAndWarningsAfterDelay() runs, sees the old Fiber is no longer mounted (it's been disconnected by Fast Refresh), and calls untrackFiberID() to clear it from the Map.
3. React flushes pending passive effects before it runs the next render, which logs an error or warning, which causes a new ID to be generated for this Fiber.
4. DevTools now tries to unmount the old Component with the new ID.
The underlying problem here is the premature clearing of the Fiber ID, but DevTools has no way to detect that a given Fiber has been scheduled for Fast Refresh. (The '_debugNeedsRemount' flag won't necessarily be set.)
The best we can do is to delay untracking by a small amount, and give React time to process the Fast Refresh delay.
Add an explicit Bridge protocol version to the frontend and backend components as well as a check during initialization to ensure that both are compatible. If not, the frontend will display either upgrade or downgrade instructions.
Note that only the `react-devtools-core` (React Native) and `react-devtools-inline` (Code Sandbox) packages implement this check. Browser extensions inject their own backend and so the check is unnecessary. (Arguably the `react-devtools-inline` check is also unlikely to be necessary _but_ has been added as an extra guard for use cases such as Replay.io.)
* update all facebook.github.io links
* facebookincubator links : update some outdated links and fix two other broken links where they are actually the latest updated ones
When a link opens a URL in a new tab with target="_blank", it is very simple for the opened page to change the location of the original page because the JavaScript variable window.opener is not null and thus "window.opener.location can be set by the opened page. This exposes the user to very simple phishing attacks.
