While making welcome a little more bloated, adding an iframe that would load a chat widget in favour of loading Firefox could be less resource-intensive on older machines.
If multiple resources are available, adding a tab bar to switch between them on the fly and keeping them loaded in the background would be ideal. This could be done just by nesting frame elements, so there would be the single webpage that has other frames load in the background. That should prevent reloads from happening as users switch between tabs.
