Needed a bit of work to set it up but works great (Firefox on Windows and Linux)/

It's not compatible with mobile browsers (Iceraven). I can't import from Google Drive

I cannot use it in my phone, I am using firefox nightly in my Android phone, and it support installing extentions. And I install floccus to sync my chrome bookmark, but it failed because it cannot scan firefox nightly's bookmark and change it. I wish you test it in firefox nightly, please, I really need it, thanks!! I dont know if firefox nightly supports extentions scan bookmarks now. Its 2023 now!🤣

Great app. Just encountered a little bug caused by one of my bookmarks being titled "<°)))><". It resulted in all the following bookmarks in that folder being interpretted as a single one. I suspect it might have something to do with improper escaping of the "<" character.

In the mobile version, you cannot click Add account and import account

floccus funktioniert super in debian(KDE) und ubuntu(KDE) mit nextcloud 21.02. Probleme habe ich in Manjaro(KDE) in einer kvm:
2021-08-04T17:21:56.883Z Starting sync process for account bruno@gis.co.at
2021-08-04T17:21:57.060Z Using "merge slave" strategy (no cache available)
2021-08-04T17:21:57.180Z Loading sparse tree as necessary
2021-08-04T17:21:57.197Z Fetching bookmarks
2021-08-04T17:21:57.687Z Syncing failed with E020: Antwort des Servers konnte nicht gelesen werden. Ist die Bookmarks App auf Ihrem Server installiert?
JSON.parse: unexpected character at line 1 column 1 of the JSON data
Gleiche Meldung auf raspi4b unter ubuntu und manjaru(KDE)

Working but missing a feature to add basic auth. This would be a feature I would spent for :)

It work's great, but it will be better (why it's only 4 star) if this app use oauth or the second factor (like u2f or otp), for the connexion, because i don't like the application password

Installed Floccus and registered an account in OwnDrive to backup bookmarks. The addon never synced.

At the left of the "Options" and "Sync Now" buttons it says "X Error!" and immediately below the buttons an error description says "JSON.parse: unexpected character at line 1 column 1 of the JSON data".
No idea what to do, error is not self-explanatory and does not give any hints regarding which JSON is crippled, nor a dump of such file; checked the GitHub site but could not make heads nor tails of the code (not a JS dev, more of a C# and VB.Net one I am).

Checked account "https://my.owndrive.com/" with my username and password and it browses OK. Would like the author to try an OwnDrive account, as they say it supports NextCloud, and post his findings, or at least a basic tutorial on how to set up Floccus with a third-party server, not just with localhost. I am not really sure of the URL to use; tried several (taken from the site being browsed in Firefox) to no avail. I'm sure I'm the one doing something wrong, but there are no good working examples of Floccus setups in the Mozilla not Addon Home pages.

Using FF 59.0.2 (64-bit) on Ubuntu 16.04.

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EDIT 1: Cannot reply to your reply, so using this edit.
Thanks a lot for the response.
No, I did not enable or install a Bookmarks app, and my guess is that I would have to do that on OwnDrive.
OwnDrive has its own applet that one would drag to FF Bookmarks to upload, but I guess that is not the one you refer to. Also, no versions given.
Can you help me providing an adequate Bookmarks App link? If it has install instructions for third-party servers like OwnDrive, much better.

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EDIT 2: Cannot reply to your reply, so using this edit.
Also tried Wolkli, does not even have a Bookmarks secction, looks like they removed it.
None of OwnDrive or Wolkli allow adding apps to their free accounts. So the addon isn't any good to me. It could work for people that have their own NextCloud server, but not my case. Too bad.
In view of this, I'll give 4 stars to the addon.

If you have access to a Nextcloud server with the Bookmarks app installed, and provide Floccus with your credentials it syncs, nice! I appreciated the robustness of being able to move my Nextcloud bookmark sync folder from Other Bookmarks to the Bookmarks Toolbar and still having it sync.

Would love to see two features: propagate tags and descriptions both ways, as well as a push sync to this client when you save or edit a bookmark in Nextcloud.

this one works very well