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Preview Thumbnails on New Tab page empty only for certain URLs

Posted

When I open a new tab, there are three certain preview thumbnails which are always empty, and there is no way I can make them show up again. They did work in the beginning, but at some time the three previews vanished and never came back. I have already tried to empy the cache and reload the sites as suggested here, but the thumbs are still empty. It's always the same three URLs where this happens. I have also cleared the history, opened the sites again and dragged the items from the history menu into a thumbnail - same result.

Chosen solution

You can open the Web Console (Web Developer > Web Console;Ctrl+Shift+K) and click the entry of the main (index) page to inspect the response headers.

You can reload web page(s) and bypass the cache to refresh all files files.

  • Press and hold Shift and left-click the Reload button.
  • Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • Press "Cmd + Shift + R" (MAC)

See also:

Read this answer in context 0

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.3 r300
  • Next Generation Java Plug-in 1.6.0_33 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Citrix Receiver Plugin (Win32)
  • 4.1.10329.0
  • VLC media player Web Plugin 2.0.0
  • VLC media player Web Plugin 2.0.0-rc
  • GEPlugin
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Adobe PDF Plug-In For Firefox and Netscape
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • DRM Netscape Network Object
  • DRM Store Netscape Plugin
  • Npdsplay dll
  • DivX® Web Player
  • Office Plugin for Netscape Navigator
  • RealJukebox Netscape Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • 6.0.12.1212
  • Windows Multimedia Services DRM Store Plug-In

Application

  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1

More Information

Allgemeine Informationen
Name
Firefox
Version
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User-Agent
Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1
Profilordner
Ordner anzeigen
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about:plugins
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about:buildconfig
Absturzberichte
about:crashes
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Grafik
Karten-Beschreibung
Radeon X1950 Series
Vendor-ID
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Geräte-ID
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Karten-RAM
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Karten-Treiber
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Treiber-Version
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Treiber-Datum
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WebGL-Renderer
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GPU-beschleunigte Fenster
1/1 Direct3D 9
JavaScript
Inkrementelle GC
1
Bibliotheken-Versionen
Minimal vorausgesetzte Version
Verwendete Version
NSPR
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4.9
NSS
3.13.5.0 Basic ECC
3.13.5.0 Basic ECC
NSS Util
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NSS SSL
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NSS S/MIME
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3.13.5.0 Basic ECC

cor-el
  • Top 10 Contributor
  • Moderator
10761 solutions 96848 answers

Helpful Reply

The pages may be send by the server with a no-cache or no-store header preventing Firefox to store that pages in the cache.
Firefox will only generate thumbnails if the page is in the cache.


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.

  • Do not use Clear Recent History to clear data like the cache and the history when you close Firefox

If there is no history then you get an about:newtab page with empty boxes (no URLs).

  • bug 756881 - New tab thumbnails not displayed (or old images displayed) for Facebook, Twitter (sites using Cache-Control no-store)

Question owner

How can I find out if this is the case? I found no "no-cache" tag or something like that in the HTML source. I used to think it worked on another computer, but now I cleared its cache as well and the previews are gone there too. So it could ineed be a general problem with the sites.

Modified by SubjectDelta

cor-el
  • Top 10 Contributor
  • Moderator
10761 solutions 96848 answers

Chosen Solution

You can open the Web Console (Web Developer > Web Console;Ctrl+Shift+K) and click the entry of the main (index) page to inspect the response headers.

You can reload web page(s) and bypass the cache to refresh all files files.

  • Press and hold Shift and left-click the Reload button.
  • Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • Press "Cmd + Shift + R" (MAC)

See also:

Question owner

I couldn't find the relevant headers in the web console straightaway, but I found a web site that displays these headers for a given URL. It looks as if the no-store header is the culprit. All the pages without previews have it.