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"Firefox prevented this site from opening a pop-up window" - Interface with Kerio Connect 7.0.0 -


I'm in a regional office. Corporate uses Kerio Connect 7.0.0 for email. Today 5/7/10 I started having problems whenever I open an email of ANY type, I can view it in viewing pane, but double clicking it gives me the message "Firefox prevented this site from opening a pop-up window." NOBODY ELSE in my company has had this problem (I have had it happen a few times in the past, but not ALL emails like today!). I am on my own in a regional office, so guidance would be greatly appreciated.

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Installed Plug-ins

  • -NPRuntime Script Plug-in Library for Java(TM) Deploy
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • getplusplusadobe16244
  • Default Plug-in
  • Coupons, Inc. Coupon Printer DLL
  • BrowserPlus -- Improve your browser! -- http://browserplus.yahoo.com/
  • Shockwave Flash 10.0 r45
  • Adobe Shockwave for Director Netscape plug-in, version 11.5
  • iTunes Detector Plug-in
  • RealJukebox Netscape Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • Google Update
  • Next Generation Java Plug-in 1.6.0_15 for Mozilla browsers
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20090729 Firefox/3.5.2 (.NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

More Information

AddThis 3.0.1
AI Roboform Toolbar for Firefox 6.9.95
Delicious Bookmarks 2.1.072
Download statusbar
LinkedIn Companion for Firefox 3.2.1
Microsoft .NET Framework Assistant
Norton IPS 1.0
Norton Toolbar 3.7.2
Read it Later 2.0.3
Yahoo Mail Watcher 1.01

Wikiwide 14 solutions 92 answers

Helpful Reply

Go to Tools->Options->Content->Block pop-up windows and uncheck it (so that Firefox allowed all and any pop-up windows to open).

If after it you can easily read messages in new window, then it's the right track for solving the problem.

As pop-ups from other sites can distract you, you can enable pop-up blocking again, but add an exception for Kerio Connect WebMail. Copy the URL/location/address of the WebMail page (something like mail.company.com or or whatever it is in your company), go to

Tools->Options->Content->Block pop-up windows->Exceptions...

paste the address into the textbox and click "Allow" button. Then click "OK", "OK" and everything should work well.

Does it help you?

Helpful Reply

I have tried this and it is not working. The only thing I can think of is that Firefox automatically upgraded to the 3.5 version I believe sometime last week, which is when I truly began to see the problem.

No wonder I have avoided upgrading! It seems to me that Firefox STILL has not corrected this problem.

I have seen multiple people as late as last week complaining @ same issue and they are reverting back to FF 3.0.

Sound like this is my only solution.

If anyone has any other ideas, please let me know.