I regularly use Opera web browser to browse websites and today, I just tested my website after installing ads at with the size 300x250 pixels, and sometimes a download box appears asking me to download a temporary file which I believe is called "push". I cancel the download and my website loads normally.
My site must not prompt users to download a file unless they specifically select the option to download the image from the site.
I never experience this issue when I have no ads on my site.
Has anyone else experienced this? If so, what can I do on my end to prevent my guests from being asked to download a useless file? do I have to not use 300x250 pixel ads on my site anymore? or should I just simply send negative feedback to google and/or its partners?