Greasy Fork is available in English.
Hugely improves load speed of pages with lots of embedded Youtube videos by instantly showing clickable and immediately accessible placeholders, then the thumbnails are loaded in background. Optionally a fast simple HTML5 direct playback (720p max) can be selected if available for the video.
< Feedback op FYTE /Fast YouTube Embedded/ Player
I don't see how this can be related to my userscript. I have no problem opening the links you've posted in Waterfox and Tampermonkey.
Probably I have a problem because of use Greasemonkey 3.17
Here's what I see right now:
https://a.pomfe.co/fohvxo.wmv
I can't reproduce the issue in a new browser profile with just Greasemonkey and my script. Some of the other addons must be interfering. My script only looks for iframes so it shouldn't do anything on image links.
Have you watched the video I posted earlier (https://a.pomfe.co/fohvxo.wmv)? It clearly shows the relationship between the activation of your script and the image displaying. IMHO
I just checked the work of your script installed via Violentmonkey. No problems at all.
So it is obvious that the issues are due to Greasemonkey 3.17.
Well, Greasemonkey 4 is known to be broken, but this is the first time I hear 3.xx versions can be faulty. Anyway, if you can switch to Violentmonkey or Tampermonkey I would advise that as I've stopped using Greasemonkey a long time ago.
It clearly shows the relationship between the activation of your script and the image displaying. IMHO
I've seen the video, but there's obviously another addon that's doing something. Like I said, I can't reproduce the issue so I can't fix it.
Thank you very much for your patience and attempts to understand the problem. You have helped me to realize that the issue is very ambiguous.
Thanks again for your magnificent script!
Issue displaying images via direct links in Waterfox
Firstly, I really like your script. However, problems have recently started. You can see the discussion on reddit.
Here is an examples of problematic links:
http://s2.1pic.org/files/2018/01/06/ef47873d73e5a07ceb5d.jpg
https://s14.postimg.org/o5wup1i8h/2018-01-08_11_37_18-_The_Mac_Life-_Waterfox.png
I use last stable version of Waterfox: 56.0.2 (64-bit) on Win 7
Please correct this.