Good question 
I’m assuming that a browser is naturally a tradeoff between: 1) Functionality, 2) UX, and 3) Privacy/Security. Like a 3 legged stool, it would be great if all things are equal and at the top of their class, but I am assuming that is really difficult.
I think most people on these forums recognize that FF is a reasonable balance between the 3 which is why it is a popular browser used in this community . I’ve heard pro’s/cons with Brave, I’ve heard of LibreWolf, which takes FF codebase and tries to remove some of the google and spying aspects. And, there is Tor Browser obviously.
So, I’m just adding the Mullvad Browser into the mix in the sense, like LibreWolf and Tor they all have roots from FF (Mullvad Browser is based on Tor – somehow, not exactly sure there). So, from the Functionality and UX side of things it seems comparable to other FF based browsers. I guess, I’m curious if folks here think the “Design choices” made by Mullvad, provide enhanced Privacy/Security relative to other options.
If the answer is yes, I would say it is good or better as an option then?
I don’t see a perfect browser ever being built out there. So, this will always be a moving playing field I think. One product may offer a better balance today, but when a new threat model or vulnerability arrives tomorrow, we might have to reconsider how to find a balance in browser choices?
@JR-Fi , thanks for pointing out the link for arm64/aarch64. I will check it out. I had contacted Mullvad support last year sometime and they said they wouldn’t be developing an arm64 version. But, that was just after they had just released their Browser.
Overall, I feel like I have good options on the desktop side to develop my habits and routines to be as private and secure as my needs dictate. I’m trying to form the habits I need for the L5 that let me get done what I need on a small form-factor computer. And while FF serves my needs on the L5, I do get nervous at times. But, I also want to be supportive of what Mozilla is doing, seeing as how they need to compete with the big bully’s in the industry.