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When I open a lot of Shiny Docs at once in Firefox, why do some not open?

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Firefox limits the persistent connections that the browser can have open to a single server. For most use cases, this will not be a problem. But a user who opens multiple Shiny Docs with many embedded Shiny components all at once may hit this limit.

To resolve this problem, increase the network.http.max-persistent-connections-per-server setting (we tested by setting it to 50). Once that limit is increased, you should be able to open many complex Shiny Docs simultaneously from Firefox without issue.

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