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In Firefox 13, the new tab page has 9 thumbnails which preview recently viewed sites.

How can I increase the number of thumbnails shown?

I tried in about:config and couldn't find a relevant entry. Google also turned up nothing relevant.

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7

Use New Tab Tools. It allows you to customize the number of thumbnails on new tab page.

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  • 1
    +1 for a perfect and elegant solution. Thanks for this extension. It is not as heavy as Tab King and perfectly solves my problem. – Hashken Jun 30 '12 at 14:18
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Increasing the number of thumbnails isn't mentioned in the Firefox 13 New Tab Page feature documentation

The New Tab King extension does permit you to configure how many thumbnails you would like to view. The default is 3 rows of 4 but you can increase the number of rows.

New Tab King - settings

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  • Thanks. It is a great extension. Roughly solves my problem. – Hashken Jun 7 '12 at 18:54
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I tried in about:config ...

The entries are under browser.newtabpage for the column and row integer values. Simply Right-click and choose modify for the new value. 

browser.newtabpage.columns // int val
browser.newtabpage.rows    // int val

You can actually add something obscene like below (15*15)

enter image description here

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Search the file /usr/lib/firefox/omni.ja/chrome/browser/content/browser/newtab/newTab.xul

Look for the lines with:

    <div id="newtab-grid">
      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>
      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>
      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>
    </div>

For 4 thumbs per line, replace for:

    <div id="newtab-grid">
      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>
      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>
      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>
    </div>

or add a 

 <div class="newtab-cell"/>

line for each

 <div class="newtab-row">

block to get more thumbs per line. If you need some more rows, add an entire block

      <div class="newtab-row">
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
        <div class="newtab-cell"/>
      </div>

taking care to leave the same number of lines 

  <div class="newtab-cell"/>

like the other blocks (for a complete matrix).

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  • Dunno if Firefox has just changed over time or if this is a platform thing, but I can find no "newtab.xul" file nor any file (in C:\Users\username\AppData\Roaming\Mozilla\Firefox) containing "newtab-cell". – Urhixidur Jul 27 '15 at 15:14

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