PMVHaven Instant Downloader by Taqy

This extension adds a download button that when clicked will instantly download the selected PMV with the video title as the filename.

It also adds a button to open up the original video .mp4 URLs in a new tab.

There's an option to add the PMV creator into the filename, either before or after the video title.

It is also possible to download videos with the default filename given by the website.