manga dl window keeps reopening

[ulysses]

On otome heroine survival manga, volumes 3 and 4 (only ones I tested):

After purchasing, it pops up the dialog to download, I selected the desktop - 2560 - version for download. They eventually downloaded, but:

There was a fair bit of hanging and needing to reclick for the download to start

Even after downloading, the dialog would pop back up. After closing the dialog with the X, it would pop back up. Only way to get rid of it was closing the tab on the browser.

During the process, it kept trying to connect to facebook.

Linux firefox 128.7.0esr

Didn't have any trouble with a light novel I purchased just before.