in my current setup, I use Mullvad Browser as my main browser for everything and I have Brave as a secondary browser I use for using stuff like Discord in which I don’t wanna install the proprietary apps on my desktop.
recently, I’ve been however thinking on maybe making Firefox my browser for that, more out of just not wanting to have anything to do with Chromium browsers than anything. the main thing that drove me to chose Brave was hearing that Chromium browsers just have a better sandboxing than Firefox, and thus this made me pick it as in to really “sandbox” all my activities on that into the browser.
would switching to Firefox somehow make it worse or should I stick to Brave? it should be noted I have Fedora 40 as my OS and would install Firefox through flatpak (since it seems to have a better sandboxing on Linux)
Brave is more secure, but choose whatever suits you better, if you like Firefox use it than. At least UI is much better. Flatpak browsers have weaker sandboxing, than chromium built-in one. Probably does not matter for Firefox, as its sandboxing is weak anyway.
my main goal here is actually isolating applications like Discord even more like, I already know isolating them on a browser IS pretty good but, I wanna do even more honestly to REALLY isolate them and limit what they are collecting from me.
would a weaker or stronger sandboxing of the browser affect it somehow or is it unrelated?
Either Brave or Firefox would work fine for this use case, So feel free to use the browser that appeals to you more.
my main goal here is actually isolating applications like Discord even more like, I already know isolating them on a browser IS pretty good but, I wanna do even more honestly to REALLY isolate them and limit what they are collecting from me.
For this goal Firefox has the edge I think (but both Browsers would be an okay choice). Both Firefox and Brave have built in features that mostly isolate sites from one another, In Firefox this is called dFPI (“Dynamic First Party Isolation”), Brave has a somewhat comparable feature called “ephemeral storage”. The goal of both is to isolate sites (and their associated cookies, etc) from each other. This approach is a good balance between usability and isolation/strong privacy protections.
And if you want to go further, you can use containers within Firefox to fully isolate a single tab, a website, or a group of websites or tabs from one another. Containers provide more complete isolation than dFPI or Ephemeral Storage. You can also use certain VPNs in combination with containers to give different containers different IP addresses. The last option (possible with both Firefox and Brave is to use separate profiles, but that is a bit overkill if your only goal is to isolate web services from one another.