from what I understand (could be wrong) these were created for people who are suffering from oxygen deprivation in high altitude.

well Firefox may enshittify, it’s still the best option imo, certainly better than chrome or anything chrome based. even better if you use a privacy focused fork like librewolf.

there are other options out there, you can look into qt browsers, those were the basis for webkit browsers. hopefully soon things like servo/verso become more useable.