Hi, You can try to set the default system volume to a lower level which would be automatically picked up by the Flash player (check '''Mixer''' on the Taskbar volume notification icon}. Alternatively you can also try to lower the volume level using the volume control on a Flash video and it will be remembered as long as Flash cookies (Windows Control Panel > [http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager.html Flash Player] > Storage > Local storage settings by site) are not deleted, or Firefox is not set to '''Clear history when Firefox closes''' in '''Tools''' ('''Alt''' + '''T''') > '''Options''' > [https://support.mozilla.org/en-US/kb/Options%20window%20-%20Privacy%20panel?as=u Privacy]. [https://support.mozilla.org/en-US/kb/Options%20window Options]