X
Tap here to go to the mobile version of the site.

Support Forum

This thread was archived. Please ask a new question if you need help.

Firefox warns about closing tab so as not to loose the content, can I disable this?

Navia
Navia
Posted

I have various browsing sessions, one is for email, one for studies etc. With one of the browsing sessions when I try to close a tab, firefox asks if I really want to close this tab, because for some reason it thinks I'm writing a message. This is really starting to get on my nerve, not because of firefox, but because of the website that triggers these popups.

Is there a way to disable these?

I've trying so hard to find an answer, so I would be really grateful for your help!

Blessings, Janne

I have various browsing sessions, one is for email, one for studies etc. With one of the browsing sessions when I try to close a tab, firefox asks if I really want to close this tab, because for some reason it thinks I'm writing a message. This is really starting to get on my nerve, not because of firefox, but because of the website that triggers these popups. Is there a way to disable these? I've trying so hard to find an answer, so I would be really grateful for your help! Blessings, Janne
  • Question details
    Product Firefox
    Topic Customize controls, options and add-ons
    System Details
    • Windows 7
    • Firefox 18.0

Additional System Details

Installed Plug-ins

  • Next Generation Java Plug-in 10.11.2 for Mozilla browsers
  • Shockwave Flash 11.5 r502
  • VLC media player Web Plugin 2.0.2
  • Facebook Video Calling Plugin
  • Google Update
  • Adobe PDF Plug-In For Firefox and Netscape "9.5.2"
  • 4.1.10329.0
  • NPWLPG
  • DivX Web Player version 2.1.0.900
  • DivX OVS Helper Plug-in
  • Wacom Dynamic Link Library

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0

More Information

Close
cor-el
cor-el
  • Top 10 Contributor
  • Moderator
15339 solutions 139030 answers
Posted

That is caused by a script that run on the page and is triggered by an onbeforeunload event

You probably can't disable such a warning alert, but you can check if you can find a Greasemonkey script to disable such an event

  • void(onbeforeunload = null);
That is caused by a script that run on the page and is triggered by an onbeforeunload event *https://developer.mozilla.org/en/DOM/window.onbeforeunload *https://developer.mozilla.org/en/DOM/window.onunload You probably can't disable such a warning alert, but you can check if you can find a Greasemonkey script to disable such an event *void(onbeforeunload = null); *Greasemonkey: https://addons.mozilla.org/firefox/addon/greasemonkey/
finitarry
finitarry 251 solutions 3421 answers
Posted

Years before, I set up a setting to block onunload from opening popup windows on some advice from a website. 

user_pref("dom.disable_window_onunload", true);
Will that still work with the current release of Firefox?  If not, will this work?

user_pref("capability.policy.default.Window.onunload", "noAccess");
Years before, I set up a setting to block onunload from opening popup windows on some advice from a website. <pre>user_pref("dom.disable_window_onunload", true);</pre> Will that still work with the current release of Firefox? If not, will this work? <pre>user_pref("capability.policy.default.Window.onunload", "noAccess"); </pre>