Does not work reliable. Need to be more stable. (Firefox-Version)
Problem: The key between the KeePassXC-Browser Add-On and the KeepasXC database (stored in the root folder) to exchange the secret data is not the same. (key: the secret key the exchange data bewteen the add-on, proxy (optional) and KeePassXC database. I compare the first digits)
This issue leads to that point, that every time the user closes Firefox and start Firefox later (say: next day or so) he has to regenerate all the connection information and login with a new name. The connection is not persistent. It's like every time before you close firefox you remove the connection info from the KeePassXC-Browser Add-On.
Same happen if i enable or disable the "Use a Proxy application bewteen KeePassXS and brwoser extension" in the advanced settings tab from KeePass. So, i think, it is not a issue of the proxy.
System: Ubuntu 18.04 LTS, Firefox 63.0, KeePassXC 2.3.1, KeePassXC-Browser Version: 1.3.0
Same happens under Ubuntu 16.04 LTS with a manuall KeePassXC Installation - because KeePassXC is not part of the regular Ubunut 16.04 distribution.