diff --git a/ServerUI.gd b/ServerUI.gd
index 31a265e..d4e19d2 100644
--- a/ServerUI.gd
+++ b/ServerUI.gd
@@ -24,6 +24,7 @@ onready var server_path_label := $"%ServerPathLabel"
 onready var port_spin_box := $"%PortSpinBox"
 onready var start_server_button := $"%StartServerButton"
 onready var server_status_label := $"%ServerStatusLabel"
+onready var open_browser_button := $"%OpenBrowserButton"
 
 onready var document_title_lineedit := $"%DocTitleLineEdit"
 onready var document_date_lineedit := $"%DocDateLineEdit"
@@ -160,6 +161,7 @@ func set_server_running(running: bool) -> void:
 	document_date_lineedit.editable = !running
 	document_title_lineedit.editable = !running
 	document_input_textedit.readonly = running
+	open_browser_button.disabled = !running
 	_set_file_tree_disabled(running)
 	_set_context_menu_disabled(running)
 
@@ -275,6 +277,11 @@ func _on_DocDateLineEdit_text_changed(new_text: String) -> void:
 		current_file.date = new_text
 
 
+func _on_OpenBrowserButton_pressed() -> void:
+	if OS.shell_open("http://localhost:%s" % port_spin_box.value) != OK:
+		push_error("Error opening browser!") # TODO: show a user-facing error
+
+
 func _on_DocInputTextEdit_text_changed() -> void:
 	if current_file:
 		var new_text: String = document_input_textedit.text