Dear Emmanuel,
Sorry, for the misunderstanding. We have replied to you for the above query. You can check your inbox.
Best Regards!

Dear Julien,
You are Most Welcome.
Best Regards!

Dear 8beast,
If you can provide us your site URL, we will observe and can provide you with possible solutions.
Best Regards!

Dear Julien,
Now, there is no such automatically scroll featured in your pages. Please review the pages and contact us.

Dear Marco,
Here are the answers to your queries:
1. Such issues are common for the iOS devices as Safari browser still does not support background-attachment: fixed; property. But it should not appear on the Android devices.
But you can add the following code in Additional CSS for removing the blurry image from all mobile devices.
Appearance > Customize > Additional CSS

@media(max-width:767px){
    .inner-header-image{
       background-attachment: scroll !important;
   }
.slider-feature-wrap .at-front li{
height:80vh !important;
}
}

(Note: it will fix header image issue in all mobile devices, For height issue please change the height value to adjust as per your requirement.)

2. For removing categories please use the following CSS
Appearance > Customize > Additional CSS

.cat-links{
display:none !important;
} 

3. The option works fine. We suggest you uninstall the unnecessary plugins from your admin panel and check again.

Best Regards!

Dear Lynne,
That’s good to know that your issue has been solved. Could you let us see your website?
Best Regards!

Dear huynhtuanstb,
It seems you put the restriction in right-click. Please remove it so that we can solve your issue.
Best Regards!