Makani is shown using Firefox on macOS at around the 25:49 minute mark, but the laptop she's using doesn't seem to be a Macbook.
When Makani is lying in bed next to her grandma, she's watching KRDY news. KRDY is a talk-radio station in San Antonio, TX (1160 AM), not a television station in Nebraska.
The film is based in Nebraska. When they go into the middle of a cornfield, the corn is shown at full height and green. During this time of year, the corn would actually be brown and harvest-ready.
In the corn field -too much fire from a quart of lighter fluid.