Another thing possibly worth mentioning too, is that with Android 4.4 Kitkat, 3rd party applications cannot globally write to the external SD card. That said, on some G3's, there is a stock (LG/Android) browser, and on other G3's, Chrome comes as the browser -- but since Chrome is a Google product, does it count as stock? I don't know. If you add Chrome to a G3 that has a stock browser, does Chrome count as 3rd party? I don't know that either.
However, Dolphin, Opera, etc. do fall into the 3rd party browser category. But to clarify a bit, 3rd party apps can write to the external SD card but only in specific directories (and 'Download' on an external SD card would not be one of them).
Possibly someone can further clarify if I am not making sense.