I just wanted to know. For example: tumbleweed comes with firefox, do people uninstall it and reinstall it in a flatpak? The question comes from curiosity.
I use flatpak for virtually everything because sandboxing your applications from each other and from your private data is a great idea to improve your system security. This helps prevent one compromised app from taking actions that affect the rest of your system.
For example, I have the VLC flatpak and used flatseal to revoke internet access because I only use it to play files. If a file tries to exploit VLC, it will not be able to upload any data or communicate with the attacker's servers. I revoke any permissions my apps don't actually need.
There are a few exceptions though. I run development and administrative tools directly because I do actually want unrestricted access to the system for these apps.
I would say the comment for mullvad browser just to use librefox is dangerous and wrong, the no script from mullvad browser served me well by exporting it to other browsers even to mobile.
Noscript is an extension that can be installed on all Firefox Desktop Variants, Chromium Desktop, Brave Desktop (and many more Desktop Chromium browsers) as well as all versions of Firefox for Android. Possibly also Kiwix, which is some hacky Desktop Chromium for Android.