Make the final step Continue button say Finish instead.

source/content-scripts/setup.ts

@@ -57,9 +57,7 @@ function startTour(
   eventHandlers: TourStepEventHandler[],
   runMainAgainAfterComplete: boolean,
 ): void {
-  const tour = new Shepherd.Tour({
-    defaultStepOptions: {
-      buttons: [
+  const defaultButtons: Shepherd.Step.StepOptionsButton[] = [
     {
       classes: "btn",
       text: "Continue",
@@ -81,7 +79,11 @@ function startTour(
         this.cancel();
       },
     },
-      ],
+  ];
+
+  const tour = new Shepherd.Tour({
+    defaultStepOptions: {
+      buttons: [...defaultButtons],
     },
     useModalOverlay: true,
   });
@@ -106,7 +108,14 @@ function startTour(
 
   // For every step we have, add it to the tour and subsequently add all the
   // event handlers to that step.
-  for (const stepOptions of steps) {
+  for (const [stepNumber, stepOptions] of steps.entries()) {
+    // If the final step doesn't have buttons defined, set the "Continue" button
+    // text to "Finish".
+    if (stepOptions.buttons === undefined && stepNumber + 1 === steps.length) {
+      stepOptions.buttons = [...defaultButtons];
+      stepOptions.buttons[0].text = "Finish";
+    }
+
     const step = tour.addStep(stepOptions);
 
     for (const [targetStepId, [eventName, eventHandler]] of eventHandlers) {