diff --git a/src/common/actionflow.py b/src/common/actionflow.py
index ced0da6..5b37d73 100644
--- a/src/common/actionflow.py
+++ b/src/common/actionflow.py
@@ -1,8 +1,8 @@
 from abc import abstractmethod, ABCMeta
-class Unavailable(BaseException): pass
-class NotAllowed(BaseException): pass
+class Unavailable(Exception): pass
+class NotAllowed(Exception): pass
 
-class Action(BaseException, metaclass=ABCMeta):
+class Action(Exception, metaclass=ABCMeta):
     def __init__(self, *args):
         super().__init__(*args)
 
@@ -28,14 +28,13 @@ class ActionFlow:
         
         if self.on[index]: raise Unavailable(name)
         if self.on[index] is None: raise NotAllowed(name)
-        value = self.actions[index].prepare()
-        self.on[index] = bool(value)
+        self.on[index] = bool(self.actions[index].prepare())
 
     def react(self):
         for index in self.indices.values():
             if (self.on[index]):
-                self.on[index] = False
-                self.actions[index].perform()
+                self.on[index] = None
+                self.on[index] = bool(self.actions[index].perform())
 
     def index(self, action: type[Action]) -> int:
         name = action.__name__
diff --git a/src/common/jsonrpc2/client.js b/src/common/jsonrpc2/client.js
index 3b55bff..86d4d42 100644
--- a/src/common/jsonrpc2/client.js
+++ b/src/common/jsonrpc2/client.js
@@ -52,4 +52,4 @@ const RemoteProceduralCall = {
 
 window.LogRecord = LogRecord;
 window.Rpc2 = RemoteProceduralCall;
-main(...arguments); // entrypoint to user-defined (async) main stub of the script
\ No newline at end of file
+main(...arguments); // user-defined code
\ No newline at end of file
diff --git a/src/common/utils/selenium.py b/src/common/utils/selenium.py
index 7c18a4d..a52e4f3 100644
--- a/src/common/utils/selenium.py
+++ b/src/common/utils/selenium.py
@@ -10,8 +10,7 @@ from selenium.webdriver.support.wait import WebDriverWait
 from selenium.common.exceptions import StaleElementReferenceException, TimeoutException
 
 driver: WebDriver|None = None
-attempts, timeout, interval = int(), float(), float()
-identity = ''.join(random.choices(string.ascii_uppercase + string.digits, k=8))
+attempts, timeout, interval, identity = int(), float(), float(), None
 
 def until(condition: typing.Callable[[WebDriver], bool], watch=True):
     try:
@@ -70,7 +69,8 @@ def click(selector: str|WebElement, wait=True, condition=False):
         except: break
 
 def setup(a: WebDriver, b: int, c: float, d: float):
-    global driver, attempts, timeout, interval
+    global identity, driver, attempts, timeout, interval
+    identity = ''.join(random.choices(string.ascii_uppercase + string.digits, k=8))
     driver = a
     attempts = b
     timeout = c