Add default empty string value for loading FIREFOX_COOKIES from env

app.py

@@ -73,7 +73,7 @@ def env_to_cookies_from_env(output_file: str) -> None:
     """Convert environment variable from .env file to cookie file"""
     try:
         load_dotenv()  # Load from .env file
-        env_content = os.getenv('FIREFOX_COOKIES')
+        env_content = os.getenv('FIREFOX_COOKIES', "")
         #print(f"Printing env content: \n{env_content}")
         if not env_content:
             raise ValueError("FIREFOX_COOKIES not found in .env file")
@@ -85,7 +85,7 @@ def env_to_cookies_from_env(output_file: str) -> None:
 def get_cookies():
     """Get cookies from environment variable"""
     load_dotenv()
-    cookie_content = os.getenv('FIREFOX_COOKIES')
+    cookie_content = os.getenv('FIREFOX_COOKIES', "")
     #print(cookie_content)
     if not cookie_content:
         raise ValueError("FIREFOX_COOKIES environment variable not set")