UserAgent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36

Steps to reproduce the problem:
1. Go to the: https://www21.atwiki.jp/botubotubotubotu/pages/28.html
2. Click link named "Ver.1.22"
3. The file is downloaded without any warning and after opened without any warning.

What is the expected behavior?
My web browser settings are to ask about where store the downloaded file.

What went wrong?
After clicking a link, the file is downloaded without any warning and after opened without any warning.

Did this work before? N/A 

Chrome version: 68.0.3440.84  Channel: stable
OS Version: 8.1
Flash Version: 

My web browser settings are to ask about where store the downloaded file and it always works so. But on that website, file (archive) is downloaded without asking where to store and after the archive is opened in Windows Explorer without any warning. 

The problem is in the link not on the page. If you just copy link and past in another window, the file will be downloaded without any warning and after opened without any warning.

Also, another link I found that behaves the same way: http://www36.atwiki.jp/mbfire/?cmd=upload&act=open&page=Photo%20stock&file=Fire%20Arrow_patch_1003_to_1004.zip

I think the problem is in link address which has "cmd=upload&act=open" in it.

Have not tested on other file types, like executables, but even with zip files that bug does not look safe.