Firefox has stronger extension support on Android, since Brave doesn't support any extensions on Android at all. On the desktop, Firefox's container tabs feature allows you to log into the same site with multiple accounts without needing to open a new window for each account.* Firefox's Gecko engine gives me no issues on the web.
Brave is a better choice than Chrome and Safari, in my opinion. But Firefox still has some advantages.
On Mull, you can install any compatible extension from https://addons.mozilla.org even if it's not whitelisted.* But a whitelisted extension is no less of an extension than a non-whitelisted one.
Brave is a better choice than Chrome and Safari, in my opinion. But Firefox still has some advantages.
* https://support.mozilla.org/en-US/kb/containers