Works flawlessly with my self-hosted wallabag.
As a [feature request], I would gladly have a darker theme (optional ?) for the popup used to add a page.

Thanks to the developers.

I have the same issue as another reviewer. The addon installs and tries to check the URL I typed in, but "Wallabag URL checked" remains at "Not checked" although "Wallabag permission checked" changes to "Agreed."

Clicking the toolbar button throws an error, "api.GetTags().then is not a function."

Wallabag itself is working fine. I'm using a self-hosted Wallabag instance - Wallabag is hosted on my NAS which is on the same LAN as the machine running Firefox and the addon. I can access the Wallabag instance from my laptop and save articles with it, but the addon stops at the "Wallabag permission checked" step like described above, unfortunately :/

So far works good, LibreWolf 116.0.2-1. Let's see how it behaves in long term. Registered, created API token, pasted everything needed in the extension and voila. Setup took less than 5 minutes. Easy peasy even for a noob.
The instruction in extension description is more than enough for setting it up using the wallabang instance.

takes forever to save an item

Can't get it to work with Firefox 107. It tries to check the URL (which is correct) but "Wallabag URL checked" remains at "Not checked" although "Wallabag permission checked" changes to "Agreed."

Clicking the toolbar button throws an error, "api.GetTags().then is not a function."

Meanwhile, Wallabag itself is working fine, so I don't think the problem is there.

So far great, easy to setup

Wallabagger is a great extension that help making the most of a Wallabag instance. Once the initial setup done (which needs Wallabag login & password plus an API client ID & secret Key from your Wallabag instance), the extension works seamlessly.
Wallabagger has a great UI, and is very easy to use. A must have for all Wallabag users.

I have been using Wallabag for a long time. This extension will not save pages to my account after the configuration.

I am a hobbyist in computation, but not clumsy, an d I still spent 30 minutes setting up the addon. Some comments

1. the link on how to set it up takes to google-chrome, which is not the best. Within that doc the link in "First of all you have to create a new client on your wallabag installation. How to do that is described in Documentation" is not working. Anyhow, I managed to do the client.

2. While setting up the addon preferences (nice that it takes you there when error in import) I didnt know what to write in wallabag url. I assume this option is necessary for self-hosted (I have no idea), but when I tried at first the default app.wallabag.it it wasn't checking Ok. I spent all the time up and down your documentation to find the app url, assuming it was related to client; stupid me I even tested the one in your example "v2.wallabag.org", and I think that finally restarting firefox changed something in cache or whatever that captured the default url as a correct one.

3. A Youtube/vimeo video would be helpful.