Our networks use a number of VPN routers' and I have to access them regularly with SeaMonkey.
Whilst the embedded webserver doesn't have a valid login response to SeaMonkey; I noticed one router's credentials were saved in Password manager and it would always prefill when accessed.
Others' always had to have their credentials typed (yes I know it is more secure, however these are protected by different and strong passwords hence the time taken to access them is convenient to have a prefill for only admin access).
I decided to see what was unique about the first router and the saved login that would prefill.
Using the data manager (about:data) I noticed that the url did not have any terminating characters; In specific if the "/" forward slash was removed from the saved host and the submit prefix fields (they should be the same - for at least this router) SeaMonkey would prefill the credential dialogue on load.
