1. Completely unnecessary given native access 2. Native will be much faster 3. Native will allow for features from the kernel that browsers do not impliment.

1. Completely unnecessary given native access 2. Native will be much faster 3. Native will allow for features from the kernel that browsers do not impliment. 4. You cannot plan for how people will use such a wide feature as the Filesystem. Saying 'X and Y should fit' requires a significant amount of honest research and testing, with a very good reason as to why the change is necessary.