If a change is to be made, I (for one) would support providing a user choice during initial Manjaro installation via Calamares; just as Office selection already demonstrates the feasibility of doing it this way.
So, the precedent already exists.
The focus then becomes just which of the browsers to include in the selection array; I dare say, Firefox and Vivaldi, to start with, as they both have a proven demand. Provision for other browsers could likewise be reserved for later additions, as needed.
The same could arguably be done with Plymouth, which continues to cause boot failure for some users. Making Plymouth an opt-in choice has also been discussed before.