files may require a PC and a deployment tool because they do not always support direct execution from the phone's file explorer. Opera Mini - Download XAP/APPX for Windows Phone
Let’s be realistic. Opera Mini on Windows 10 Mobile is not a daily driver. But it still offers a few quirks: opera mini xap for windows 10 mobile work
For W10M users requiring a lightweight browser, functional alternatives include: files may require a PC and a deployment