Unable to add account to Librewolf extension

Hi 1P_Evon ,

unfortunately I'm seeing a similar issue as Nisshoku420 with the latest version of LibreWolf (128.0.3-1) and the 1Password extension (2.26.1).
Similarly to the previously reported issue, I cannot add an account to the extension - I'm presented with the same plugin page prompting me to add an account, which redirects to the appropriate 1Password sign-in page. On the contrary to the previous poster, I can log in successfully and access my vault, however I don't seem to be logged in through the extension (clicking it again prompts me to add an account) and don't get any popup to add the account to the extension...
I've tried disabling all extensions I've had in LibreWolf (which is just uBlock Origin and Darkreader), however that didn't change anything.
I'm using the EU version of 1Password and tried opening the link you suggested (and it's .eu variant) directly as well - without success, unfortunately.

Interestingly enough, I was using an older version of LibreWolf (123.0-1) a while ago and managed to log in successfully there. Since the account was still added, I was able to enter my password and log back in, even after an update to the latest LibreWolf version - however a completely fresh install on a different PC didn't allow me to add an account, even with 123.0-1...

Any idea, what else might be causing this issue?
Thanks for you and your team's continued effort for a derivate browser that's probably making your life quite a bit harder in this regard - greatly appreciated!

BR,
MorpheusXAUT