Web browser extension issues

We just bought Remote Desktop Manager + Devolutions Server for our team, and I'm currently deploying the latest version (11.6.2.0) but I'm having several issues with browser extensions.

The Internet Explorer extension (version 3.0.5.0) does not connect to RDM at all - the drop-down menu shows 'not connected', although the port is set to the same value (19443) as Firefox and Chrome extensions which do connect successfully. Also, the toolbar cannot be moved or hidden, and a single button takes up an entire row.

In Firefox, the extension (version 3.0.8.0) connects to RDM, but while it's active, Firefox's own password manager is disabled - I have hundreds of passwords stored there, and RDM doesn't seem to have an option to import them either.

In Chrome, the extension (version 3.0.4.0) appears to be working, but I don't have any saved logins in Chrome, so I can't tell if it disables Chrome's embedded password manager or not, like it does in Firefox.