"save note" is now "save link with note" - i.e. we're saving a current URL together with the text note

utils.js

@@ -7,4 +7,22 @@ function randomString(len) {
     }
 
     return text;
-}
+}
+
+function getBaseUrl() {
+    let output = getPageLocationOrigin() + location.pathname;
+
+    if (output[output.length - 1] !== '/') {
+        output = output.split('/');
+        output.pop();
+        output = output.join('/');
+    }
+
+    return output;
+}
+
+function getPageLocationOrigin() {
+    // location.origin normally returns the protocol + domain + port (eg. https://example.com:8080)
+    // but for file:// protocol this is browser dependant and in particular Firefox returns "null" in this case.
+    return location.protocol === 'file:' ? 'file://' : location.origin;
+}