well you can use Firefox as it is you trust Mozilla and (the real) Firefox on iOS will not implement anything that is insecure right now, Mozilla will not be

well you can use Firefox as it is you trust Mozilla and (the real) Firefox on iOS will not implement anything that is insecure right now, Mozilla will not be able to implement plenty of web standards even if it was secure according to Mozilla browser engineers no question with time, Apple will be forced to allow modern web capabilities in Firefox too and also make the iOS welcoming for modern web browsers like Firefox just like literally every other OS is welcoming, including macOS it will be a debate around whether these OS changes Apple supposedly has to make are a reasonable effort for Apple to make... being that big and and having macOS already capable, iOS will be just as secure for Firefox as every other OS however, you can trust Mozilla engineers that they will not expose Firefox browsers to security problems on iOS even when it is sub-optimal, so in some weeks just check out what Firefox on iOS already can and use it