[spotman]

The browser tabs have an upper limit sure, because on the client/browser side, it just might be unfeasible to open more than 100 tabs realistically.

But, I can assure you, you could open 1000 tabs, and dynamo will be fine, and not lose your data.

You should really read the article I linked, especially the part about vector clocks, it discusses a common approach for dealing with duplicate data, conflicts, and resolution, at scale.