@angus
I think there is a problem with topic list preview.
When I disable the thumbnail at site setting, my transfer decreases about 500KB, But when I completely remove this plugin the transfer decreases 1.4MB, What is this plugin doing? Why the transfer decreases so much when I delete this plugin but the disabled thumbnail reduce the transfer just 500KB,
I thought the transfer for this plugin is images but I understood the transfer is for unknown requests.