Thanks for the feedback :)

Regarding mobile devices my plan on the short term is to integrate with Floccus.

In the meantime I have been using a workaround with Syncthing as following:

I have a folder synced between my mobile devices and gosuki. From time to time I export all the mobile browser bookmarks using the built-in export to html. On the Gosuki node you can setup the html-autoimport module which continuously watches the synced folder and imports the bookmarks. It works flawlessly.