pt_BR user? Warsaw works ok for CEF home banking. I just tested only entering my login, didn't enter the password.
The problem is that Slackware isn't a "homologated" distro like Debian, OpenSuse and Ubuntu (yes they think Ubuntu is a "top seed" distro),
so if some problem happens while you are running any non-homologated distro (not only Slackware),
probably they won't give your money back: "You are running a non-homologated Linux distribution, you broke the contract".
I run a Debian vm in VirtualBox for my home banking needs.
About Teams, would be this one?
Microsoft Teams for Linux is your chat-centered workspace in Office 365.
Instantly access all your team’s content from a single place where
messages, files, people and tools live together.
This script repackages the Debian package provided by Microsoft.
Only the 64bit version is available.