It works the way it should. There are problems on some sites but all the major sites work well. I think that the author will fix minor problems in future versions. The main thing that would not abandon the addon. :)

I found these instructions and they work. You can disable HTML5 autoplay natively without an add-on.

http://www.pcworld.com/article/3119886/software/stop-html5-autoplay-videos-in-chrome-firefox-opera-but-not-edge-explorer-safari.html

Does not prevent autoplay on TV GUide

thanks a lot

Go over to the huffington post's website and load any page. It will autoplay even with this enabled.

This add-on certainly stops content from autoplaying as intended, but currently will not save your preferences permanently.

For example, one has to disable the add-on each time you want to watch Netflix, no matter whether you stay on the same tab or ask to save your settings. This is on Firefox 50.1 (up to date as of this writing). Unsure what the bug is, but I'm not alone in experiencing this issue.

A perfect replacement for the abandoned and broken Flash Control, first on the scene to manipulate HTML5. It was overkill for me as Flash as not been allowed on any systems I own for almost five years.

In a way, it is good FC is abandoned as it lead me to this extension which does exactly what it is supposed to do.

I don't have need for white/blacklisting tho I understand those who do might want an efficient manager.

e10s/Electrolysis/multiprocess support enabled!

Mozilla 50.0.1 - Win7x64