Can't upload files

[afa4ii]

win 10 version 1803 OS build 17134.523. Joomla version 3.9.3

in components open   jdownloads, click on Files then click upload files, I get this error: Your browser doesn't have html5,flash,gears,silverlight,browserplus,html4 runtime support, this happens with Firefox 65.0.1 chrome & edge, anyone else have this problem?

[ColinM]

Hi
I also have Firefox 65.0.1 but I do not get a problem!!In Config Uploads tab filed 'Uploader runtime normally yje selection All Runtimes is OK.  Suggest you set it to the HTML5 option as a test.
By the way does this happen every time?
Colin

[Arno]

 We use for this the plupload script. This need jquery and jquery UI. Possible that in your Joomla installation does exist a script conflict.
See as example here or use self the google search:
https://www.joomla-monster.com/documentation/troubleshooting/your-browser-doesn-t-support-html5-flash-silverlight-and-even-html4

Or
https://stackoverflow.com/questions/38466334/your-browser-doesnt-have-flash-silverlight-or-html5-support