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How to make thumbnails smaller on Mozilla Firefox start page

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thumbnails of websites I visited are too large, just few of them fit on the screen, I want to make them smaller

thumbnails of websites I visited are too large, just few of them fit on the screen, I want to make them smaller

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Firefox should adjust the size of the thumbnails automatically to make them all nine fit in the browser window

I can decrease the dimensions of the about:newtab window to 700x624 without seeing scroll bars.

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 or otherwise make changes.

You can check for problems with the localstore.rdf file.