Hi harvester, The only way that I know how to make the Bookmarks Editor window larger is to click on the menu button - as in the first image - then, it becomes a bit larger - as in the second image.

harvester said

by default kept last folder of bookmark?

There is a setting for that in the following add-on:

https://addons.mozilla.org/firefox/addon/default-bookmark-folder/

Thanks! I all already passed it. Simply as it was possible to program display only 4 folders. The programmer that itself did not see that it will be very inconvenient or to it have ordered )))

Please choose the correct solution so that this question can be properly archived.