Hello,
I am French.
I am using Firefox Quantum v61.0 (64 bit) under Windows 10 64 bit Family v1803.
I have tested and apreciated your existing Bookmaks Organizer extension in French. He helped me sort through my 1096 bookmarks.
I would like to suggest an option: A button to show / hide the contents of the complete tree of Firefox bookmarks.
Indeed, when I reinstall Firefox or I install the update, the side pane of the bookmarks only displays the folders, and you have to open them manually to display the contents.
It's tedious.
Thank you.