Hey there!

Please check out the following:

About bookmarks on FF - https://support.mozilla.org/en-US/kb/bookmarks-firefox

How to sort your bookmarks quickly to quickly find the ones you want: https://support.mozilla.org/en-US/kb/sort-bookmarks-quickly-find-ones-you-want

And lastly how to organize them: https://support.mozilla.org/en-US/kb/bookmark-folders-organize-your-bookmarks

Hope I helped!

Kind regards,

Bithiah

Hi No, it isn't what I'm looking for : I would like to have my bookmarks in the same order after the synchronisation of Firefox on a new computer : I do know how to personalize and organize bookmarks. Best regards

Not really. Sync doesn't know, how data are organized, so sometimes things can come messed up. But you can search for an addon on addons.mozilla.org to sort it in a declared (alphabetical) order.