@Override
	public boolean canCloseDomainFile(DomainFile df) {
		PluginTool[] tools = getProject().getToolManager().getRunningTools();
		for (PluginTool tool : tools) {
			DomainFile[] files = tool.getDomainFiles();
			for (DomainFile domainFile : files) {
				if (df == domainFile) {
					return tool.canCloseDomainFile(df);
				}
			}
		}
		return true;
	}
Check the "What's New" preference; if it has not been set, then show the
"What's New" help page. This should only happen if the preference was
never set.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/FrontEndTool.java