FlashFox is an older browser that still supports the NPAPI Flash plugin. You need to manually install an old Flash Player 11.1 APK (from a trusted archive like APKMirror) and then use FlashFox to load local SWF files.
It is crucial to understand the key distinction at the very beginning: the "Macromedia Flash" name refers to two different but related things: macromedia flash 8 apk for android
: Some APKs might offer integration with the device's web browser, allowing users to view Flash-based websites. FlashFox is an older browser that still supports
Transfer a legitimate installer of Macromedia Flash 8 (such as a .exe setup file) to your Android device’s internal storage. macromedia flash 8 apk for android