Do you mean the 3x3 tiles on the about:newtab page?

• https://support.mozilla.org/kb/new-tab-page-show-hide-and-customize-top-sites

Those tiles contain recently visited websites and are created from the history. You can copy the places.sqlite file from that profile folder to another Firefox profile folder to transfer the bookmarks and the history.

• https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile

Hi Cor-el, thanks, but I'm afraid that won't do. The tiles are generated from browsing history alright, but as soon as ye pin them, they're no longer so. You get to choose which ones ye want. Also through "about:config" ye can change the quantity of rows and columns. So my question was how to migrate such a customized newtabspage with pinned bookmarks.

If you pin or block a specific page in a tile then this state is saved in two prefs on the about:config page.

You can change the order of the boxes on the about:newtab page and drag an item to a different tile to pin it to that position or you can remove a website by clicking the close X to block that URL. You can drag a bookmark or history item and drop them in a tile on the about:newtab page to pin them and have your own favorites sites showing.

Changes made manually on the about:newtab page are stored in prefs that you can find on the about:config page.

• browser.newtabpage.pinned stores websites that you have pinned to a tile.
• browser.newtabpage.blocked stores websites that you have removed by clicking the X button in a tile.

THX! Copying/pasting the pinned-info (+restarting Firefox) did the job.