Good news, everyone!
I've wrote a simple userscript. It add 'Switch "images/links"' command in your greasemonkey/tampermonkey menu. By clicking on that menu script will switch all links to images and remember your choice for that domain. When you click it again it will move links back.
Here the link:
https://github.com/VapaudenKuolemast...her-userscript
Or direct link:
https://github.com/VapaudenKuolemast...itcher.user.js
You can use it on sites with "Index Of ..." lists, like
http://photosintimes.free.fr/photos/gal15/. Don't use it on ftp, because script try to download many files in one time and ftp allows you to open one or two connections simultaneously. Ftp would be busy and script will get access to very few files. Meaningless.
As you can see, my English is pretty awful. I would appreciate it if anyone can help me make my README.md more understandable or at least show me my mistakes in this post so I can edit it.
Also I open for suggestions to make my script better or add useful functions.