FF4 javascript alertbox can't be closed
When a javascript alertbox is opened in a site it is not possible to close the alertbox.
Chosen solution
Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode
Additional System Details
This happened
Every time Firefox opened
This started when...
The introduction of FireFox 4
Installed Plug-ins
- VMware Remote Console Plug-in
- Office Plugin for Netscape Navigator
- NPRuntime Script Plug-in Library for Java(TM) Deploy
- Adobe PDF Plug-In For Firefox and Netscape "9.4.4"
- Default Plug-in
- Google Update
- Shockwave Flash 10.2 r159
- Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers
- Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
Application
- User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.2.17) Gecko/20110420 Firefox/3.6.17 (.NET CLR 3.5.30729)
More Information
Any website using javascript alert popups
Can you close that box with the ESC key?
Don't you see an OK button?
Question owner
The ESC key does close the box. I can see the OK button but it doesn't do anything. I noticed this weekend that this problem only seems to occur on a 32 bits Windows XP or Windows 7 and not on 64 bits versions of Windows
Chosen Solution
Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode
Question owner
It was indeed caused by an custom Add-on. I notified the developer of this add-on. Thanks very much.