Can you have your browser and keepassxc both in flatpak?

Hey all!

Something that I have been wanting to get working is having my browser and password manager both in flatpak. I really like being sandbox and having faster updates if the distro is on the slower side perhaps.

I have a set up with Firefox as a deb and keepassxc as a flat and that works find as one would expect. I did want to install Vivaldi as a flatpak and was not able to get it to talk with keepass.

In my reading I found this: installing KeePassXC natively, which you’d actually want for security reasons.

installing KeePassXC natively, which you’d actually want for security reasons

What is mean by that line of reasoning?