for _, prom in next, workspace:GetDescendants() do
  if prom:IsA("ProximityPrompt") then
    prom.PromptButtonHoldBegan:Connect(function()
       if prom.HoldDuration <= 0 then return end
      fireproximityprompt(prom, 0)
    end)
  end
end

workspace.DescendantAdded:Connect(function(class)
  if class:IsA("ProximityPrompt") then
    class.PromptButtonHoldBegan:Connect(function()
        if class.HoldDuration <= 0 then return end
      fireproximityprompt(class, 0)
    end)
  end
end)