I have a question to ask. I always wonder. When I type in my password and username what can be done with that info. Look at brave browser. I will make a fictional scenario.
Let us say brave browser collects all passwords and for which site they are for and emails it daily to the dev?? How do I know if I type my info into a program it is safe? What if the wallets people dev for crypto is on a timer and one day all wallets are emptied and hell breaks loose. Could this happen? Please say something to calm my nerves.
Officially, you don’t unless you audit the source code (if available) and build the software yourself.
Now, you don’t even know if Windows saves your passwords and keystrokes when you use it. Or if your PC manufacturer implemented a chip that opens a backdoor on it, etc, etc... At some point you will have to trust someone.
My suggestion: on most cases, don’t lose your head with it. It’s not worth it. Obviously you shouldn’t trust random softwares or websites, but most known softwares can be trusted (in part). Just do your research and see what other (trusted) members say about it.