The Federal Regional Court of the 1st Region (TRF-1) has overturned a trial ruling and reinstated an injunction imposed by the Administrative Council for Economic Defense (Cade) on Apple, as part of an investigation into alleged abuse of dominant position in the app distribution market for iOS devices. According to the ruling, the company will have 90 days to implement the changes mandated by the antitrust authority.
Sideloading (is supposed to) mean just transferring files between local devices, as in, you aren’t uploading or downloading them, you are going sideways. E.g you download a song to your pc, then sideload it to your mp3 player.
That’s also where it comes to installing phone apps, as you transfer the app file to the phone yourself. Being “outside” or “going around” the official method just happens to be another way to interpret the meaning of “side” in the word.