Guest Safari?: On a Mac, open Safari, and go to Preferences > Advanced, and there should be an option for “Default Encoding.” I will add the caveat that I am a Windows user, and not conversant with Macs, iOS, or Safari. I do not know if Safari for mobile platforms has this option, and my sole Apple device, an elderly iPod Touch Gen4, is singularly unhelpful.
Omeganian: There is no solution via platform that I know of, since I am not an Android developer. I am, however, using the add-on myself since my preferred browser is Chrome, on a desktop running Windows 10.