Flash Player for Internet Explorer - ActiveX
https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_ax.exe
Flash Player for Firefox - NPAPI
https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player.exe
Flash Player for Opera and Chromium-based browsers - PPAPI
https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_ppapi.exe