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New Tab Page - thumbnails are not using the files from cache folder, but they want a connection to their origin website.

  • 5 respostas
  • 1 tem este problema
  • 21 visualizações
  • Última resposta por cor-el

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Hi there,

each time I visit a website, FireFox saves a thumbnail of all these sites for the "New Tab Page". Those thumbnails are cached in the 'thumbnails' Folder . That's so far ok for me.

The problem is:

Every time if I use the "New Tab Page" (...after shutdown & reopening the browser and only with 'mousehoover' on any thumbnail) all the thumbnails on that page don't use the cached thumbnails from the local profile folder.

This means: Instead of using the cached thumbnail-files all(!) these thumbnails dials to their origin websites without(!) a mouseclick on any of these thumbnails (...see jpg pictures) !

I'm using the "Clear history when Firefox closes" with the following options:

privacy.clearOnShutdown.cache - true
privacy.clearOnShutdown.cookies - true
privacy.clearOnShutdown.downloads - false
privacy.clearOnShutdown.formdata - true
privacy.clearOnShutdown.history - false(!)
privacy.clearOnShutdown.offlineApps - false
privacy.clearOnShutdown.passwords - true
privacy.clearOnShutdown.sessions - true
privacy.clearOnShutdown.siteSettings - false(!)

So, i can't believe that this homedialing of pinned and unpinned thumbnails should be a normal function.

1. Screenshot: thumbnails in the New Tab Page

2. Screenshot: the same thumbnails in the Cache Folder "thumbnails" (...also they are there after shutdown of Firefox)

3. Screenshot: Dialing to the origin websites (...after restart of Firefox)

The Browser Version is Firefox ESR 31.2.0 and in the installation are no Add-ons, which are - for example - prefetching linked websites.

I would like to use the "New Tab Page" without 'homedialing', so the question is:

How can I force the thumbnails to use the cached thumbnail-files ?


How can i disable the 'loading of content from their origin websites' already on mousehoover ?

Modificado por JanetM. a

Todas as respostas (5)

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Here are the Screenshots:

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You could get rid of the hassles by using about:blank for the browser.newtab.url. That way, a new tab would be blank.

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There is a preload pref available that you could try to disable on the about:config page.

  • browser.newtab.preload = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

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I have tested 'browser.newtab.preload' with 'false' in the about:config.

It seems that this has only a function for http sites.

If the thumbnail is combined with a https site -> the browser keeps on doing a generation of preloads.

So, if there are thumbnails combined with sites which have a dynamical IP adress (provided that they are non pinned or not in the string 'browser.newtabpage.blocked'; after restarts of Firefox and without deletion of history) the browser is trying to preload data from the (now) none existent origin or rather from a new "origin", but now with another identity (...see for example -> thumbnail for a configuration menu from a router with dynamically changing IP address).

@finnitary The first assumption for me is: I would like to use the "New Tab Page" ... or rather I would like to use the Thumbnails(!) on the "New Tab Page" without preloading of stuff.

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It is possible to disable the thumbnails altogether and only leave the URLs below each tile.

You can create this Boolean pref on the about:config page to prevent Firefox from generating thumbnails for the about:newtab page.

  • name: browser.pagethumbnails.capturing_disabled with value: true

Delete the thumbnails folder in the Firefox profile folder to remove already stored web page thumbnails.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

You can use this button to go to the currently used Firefox profile folder:

  • Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)