Unable to stream to latest desktop verions of chrome,firefox,safari etc

Hi there
Testing on mac and windows desktop browsers and safari on Iphone
when entering http://192.168.0.170/mjpeg1/1 
On desktop I get the following response :
Server is running!

URI: /mjpeg1/1
Method: GET
Arguments: 0

On Iphone I am asked if I want to download 1

Working no problem on Android mobile browser and vlc

Kind Regards
Val