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Microsoft Outlook Web App causes Mozilla Firefox v. 17 to "not respond" every time I go to the page. Help?


As stated, every time I try to check my email, either by access it from the "most visited" tab on v. 17 or manually typing it into the address bar, It begins to load/open the page but after approx. 3 seconds causes the entirety of Firefox to "not respond" and freeze for about 5 seconds. While no harm done, this is extremely annoying. This is the only website to cause this problem and it is a fairly recent occurrence, starting about a week ago. My version of Firefox is up to date, I have cleaned my cache, cookies, history etc.

Does anyone have an idea what might be causing this and what steps I could take to either reduce its occurrences or completely stop this?


Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.5 r502
  • Google Update
  • Next Generation Java Plug-in 10.9.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Adobe Shockwave for Director Netscape plug-in, version
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • VLC media player Web Plugin 2.0.2
  • Adobe Shockwave for Director Netscape plug-in, version
  • dp Launcher Plugin
  • 5.1.10411.0
  • Facebook Video Calling Plugin
  • Adobe Shockwave for Director Netscape plug-in, version
  • Plugin for Wacom tablets.
  • Wacom Dynamic Link Library
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers
  • np-mswmp


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0

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Helpful Reply

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do not click the Reset button on the Safe mode start window or otherwise make changes.

You can also check for problems with the places.sqlite database file in the Firefox Profile Folder that stores the history and bookmarks.