This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

window.onbeforeunload is not working in firefox latest version

BalajiPolisetty7
BalajiPolisetty7
more options

Javascript window.onbeforeunload event has a function and at the end we have alert . in Previous version of firefox we used to get alert after executing that function . But in the latest version of firefox we are not getting . Can you please provide in which this will be resolved. or please provide the work around .. thanks alot.

Javascript window.onbeforeunload event has a function and at the end we have alert . in Previous version of firefox we used to get alert after executing that function . But in the latest version of firefox we are not getting . Can you please provide in which this will be resolved. or please provide the work around .. thanks alot.

All Replies (2)

philipp
philipp
  • Moderator
more options

hello BalajiPolisetty7, it is the intended behaviour that alert() isn't allowed in onbeforeunload. many rogue sites use that to trap and scam users when they want to leave a page...

BalajiPolisetty7
BalajiPolisetty7 Umnikazi wombuzo
more options

Thanks for your timely reply . i need to call few java script functions on close of browser tab / window just want to know what is the in built javascript/ jquery functions that i need to use because older version of firefox used to support the window.onbeforeunload so last statement of the event we placed alert so everything got executed and alert box will come . Now with the current version without executing all the statements in the event browser is getting closed.

Please do the needful thanks alot