catch Simple Browser tab close event

[Zelfior]

Hello,

i am developing an extension where i open a server from a python command in a terminal, and open show the server webpage using a simplebrowser.show. How can i get to close the terminal when the browser tab is closed?

I expect something like this, but i don't know where to get the "SOMETHING".

terminal = vscode.window.createTerminal("my terminal");
let command: string = "python -m panel serve some_script.py"
terminal.sendText(command);
vscode.commands.executeCommand("simpleBrowser.show", "http://localhost:5006", panel);

SOMETHING.onDidDispose(() => {
        terminal.dispose();
    });

Thanks in advance