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Thumbnail on new tab page not showing up


Well this isn't a huge problem, in fact I don't mind it much, I'm just wondering why this is happening:

Upon opening a new tab page, thumbnails usually show for your 9 "top sites". For me however, they usually show up, but on a particular website, it is not. I have no idea whether it has to do with Firefox or the website, but I figured it was worth asking it on here. (the website is http://thenforumsite.forumotion.com)

Additional System Details

Installed Plug-ins

  • Next Generation Java Plug-in 10.21.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Google Update
  • Shockwave Flash 11.7 r700
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Unity Player 4.1.2f1
  • Vizzed Retro Game Room Plugin
  • npmnqmp 989898989877
  • Free Realms Installer
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • Adobe Acrobat Plug-In Version 7.00 for Netscape
  • RealJukebox Netscape Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • Windows Multimedia Services DRM Store Plug-In


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0

More Information

  • Top 10 Contributor
  • Moderator
10738 solutions 96600 answers

Helpful Reply

The thumbnails on the about:newtab page are generated from the cache, so if the page is not in the cache or otherwise can't or won't (secure pages) be rendered as a PNG image then you will get an empty box.

Pages that send a no-store or no-cache header aren't cached and thus Firefox does not generate a thumbnail.

  • Top 10 Contributor
  • Moderator
2042 solutions 8887 answers

hello ThunderLion, websites can specify that their content shouldn't be cached by browsers - in this case firefox won't create any thumbnails for them which would show up on the new tab page... this is also the case for the sample you've provided. this problem will likely be addressed in a later version of firefox.

Question owner

Thank you, if it makes any difference, the thumbnail on the website used to show up, but it's just recently that it doesn't...

Daniel Delgado 0 solutions 1 answers

Finally, today it was released a Nightly version where this has been solved. :)