This works 99 % of the time and is one of my most used addons when collecting data. Thank you very much for your work. If I may suggest a few things I really would like;
1 - Options.. I always feel uneasy when there is no settings or anything to adjust if needed. Most of the time I could have had great use of some filters to only list the largest file, or only files that and also would be great with "select" options so I could easy and fast select the files I was interested in and click download.
2 - Option to change filetypes, preview size, and also window/font size. The buttons to click for download or open is very small and often missclicked.
3 - Custom filters for custom sites, that can be saved for later use.
4 - Almost forgot about this one.. but a way to re-order the listings so the files (images/pixels) are from sorted from big to small or small to big and if possible first/last found.

Would love to help you improve this addon, but I need to learn how to make addons first as I have really no clue. I do know php, mysql, css etc so if there is anything I could help with, let me know :)

Also, for the next update.. can you please add some ID on the divs and such so its easier to make a personal style ? Yet again, thank you!

This did exactly what I needed on a complex web page that was using javascript for a dynamic photo display. By getting a list of all the sources, I was able to save them separately. A very useful little tool.

Quite potentially a powerful add-on. If "List Sources" can list the sources of images, audio and video of a particular page, then is it also possible to list other items as well? Like css, js, xml requests, fonts, swf, other objects, etc. Adding more items would make this add-on more powerful, similar to the old Adblock Plus 2.9.1's "Open blockable items" option, which by default opens an attached window at the bottom of the Firefox screen, which lists those items mentioned. That handy and powerful feature is gone in the newer ABP WebEx releases. If "List Sources" could list more item types, then it could be used in tandem with ABP, uBO's custom filter creation. I'm respectfully requesting for such addition and thanks in advance if you plan to add more items in the future.

very good, small, speedy :)
Will it come for Chrome, Opera Browsers?

2018.04.29
Thanks for your answer, but where can i find it on chrome?
https://chrome.google.com/webstore/search/List%20Sources?_category=extensions

Could you please post the direct Link?
tx

ps: How can i answer you directly under your comment???

pps: SOLVED: He told me where it is! :D
https://chrome.google.com/webstore/detail/list-sources/oapgpbbeejfgmjejkjgnikaepmfbccpb

ppps: Yout Addon does NOT list Images from embedded Youtube-Video like GetThemAll does...