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How to shut off the preloading of my quick links

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New User

How to shut off the preloading of my quick links

I want to turn off the quick links from the recent 9-box layout that was added to firefox. It used to be just bookmark links, but now it's quite obvious that there is some sort of internet activity that occurs as those box links load. And Firefox is now using 210mb on a single tab.

If there is no way of turning that off, then i'm just going to find an older version of firefox and run it for the time being, because I just want no part of those box links working that way.

So if someone would be so kind to tell me how to turn it off, and not just hide the function, it would be appreciated.

14 REPLIES
Site Moderator

Re: How to shut off the preloading of my quick links

That content are thumbnails that are created from the disk cache (so shouldn't cause internet activity) and stored in the thumbnails folder in the same location as used for the disk cache (see the about:cache page via the location bar), but at a different level (replace the trailing \Cache\ to \thumbnails\).

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

  • name: browser.pagethumbnails.capturing_disabled with value: true
  • name: pageThumbs.enabled with value: false

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

See also:

New User

Re: How to shut off the preloading of my quick links

First, I have Firefox set to delete all cache, as well as any passwords after closing.

Secondly, this has never happened prior to yesterday when I updated to 27.0.1

So if it's finding this in a folder, then it's finding it in a folder that shouldn't have anything saved, since I tell Firefox not to save anything, nevermind the fact that it only started with the new update.

Site Moderator

Re: How to shut off the preloading of my quick links

Did you find any thumbnails in the thumbnails folder?

See also this article about the New Tab page (about:newtab):


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.
New User

Re: How to shut off the preloading of my quick links

There is no thumbnail folder in my Profiles folder. I checked every single folder and sub folder in there, as well as searching for "thumbnail" in the folder search (windows 7) And yes, this is with "show hidden files and folders" selected.

New User

Re: How to shut off the preloading of my quick links

Also, I believe you're mistaken about the thumbnail situation in general. I have witnessed the thumbnail view in that shortcut box changing while I was viewing it. It was clearly updating, which would imply a live internet feed for this function, and not something saved from a previous usage.

Site Moderator

Re: How to shut off the preloading of my quick links

Are you sure that you hadn't visited that page in between?

Try to set the browser.newtab.preload pref to false on the about:config page.

New User

Re: How to shut off the preloading of my quick links

No i'm not, tbh.

But I did come up with something that seems to show that it does connect to the website.

I did a full computer search for thumbnails, and found the folder of them. Didn't seem to have anything to do with firefox, either. But those shortcut thumbnails were in there, so I deleted them. But I left that folder open, and then opened up the Firefox shortcut tab, and one by one they repopulated in both firefox, as well as the folder, all while I was watching.

That really seems like it's connecting to the internet to accomplish this, which I don't like.

At this point, i'm probably going to try turning that feature off like you posted, and see how it goes from there. But it's very unfortunate that this seems to have piggybacked in with the 27.0.1 update.

Not to mention, that FF is now using almost 3x as much memory as IE does with a single tab open.

Site Moderator

Re: How to shut off the preloading of my quick links

In which location did you find those thumbnails?

New User

Re: How to shut off the preloading of my quick links

I just opened My Computer > C drive, then typed thumbnails into the upper right search window. It actually pulls up 5 thumbnail folders, but only the top 3 have the thumbnails in them. When you delete the thumbnails from one of them, it deletes them from all 3.

Interestingly, I kept the folder open as I logged off, and it did indeed delete all of them the way I have firefox set to do.

But as soon as I re-open the FF shortcut tab, the folder repopulates again, along with the shortcut tab windows, of which I have 8 set to various shortcuts.

So this really seems like it's firefox connecting to the internet to accomplish this. Which could be part of why FF is using so much memory.