User Case: We have implemented the session timeout logic into our portal wesite. As per the customer requeriment after we login into our application if the wesbite is idle for more than 9 minutes then the website should display a popup message from 9th minute to till it completes the 10th minute. Message: If there is no operation for 10 minutes, the session will be expired. (remains 0 seconds). Do you want to continue. After it corsses the 10th minute, if the user didn't take any action then the session will log off automatically. Current Staus: we have implemented a custom logic to achieve this funtionality, as per the requiremnent it is working successfully in all browsers except one scneario in Mozilla browser. Issue: When we open our website "https://xxxx.xx.xxxx.co.jp/" in mozilla browser first tab the popup message is not coming until unless we activate the web page. Also this is an inconsistent behavior. Example 3 or 4 times once we are facing this issue. Example: as per the business logic website should display a popup message on 9th minute after it crosses 10th minute it has to logoff automatically, in this case if i come back to the web page after 15th minute as per the logic it should have been logoff the session, however here the popup message is coming up now. Note: when we test the same within localhost server it is working successfully, however when we promoted the same bundle into dev server environment it is not working as expected resulting an issue.