dom.indexedDB.enabled = false causes errors

[Sandwichs-del]

If you set "dom.indexedDB.enabled" to false in firefox, the StorageAbuser will crash with error "A mutation operation was attempted on a database that did not allow mutations" in console.

I believe this is more of firefox problem, because it makes the API readonly instead of disabling it.
Because other websites will experience the same crash, I don't believe you should be fixing this.
Or, I guess BSA could say "IndexedDB is readonly. Websites that try to use it may crash."