When you disable autoplay with this addon, then what basically happens is that the video is still played automatically, but the addon aims to pause the video immediately. However, this does not work very well, because the first fractions of a second are played nevertheless before this addon steps in. So you will hear a short "blib" or "blob" every time you open a video. This this very annoying, especially if the video has loud sound in the beginning. Following the advertisement claims, I expected an option to completely disable autoplay. But there is none. Even if you disable autobuffer, the video is still played for a fraction of a second.

Another option that might be useful is to disable auto next video aka "up next". YouTube automatically switches to the next recommended video after the current video is finished. I don't like this behavior and would like to have the old behavior back where it just shows the end screen. This is not possible with this addon.

With YouTube+, a greasemonkey script, all this was possible, but unfortunately it's broken in new YT layout.

Otherwise, nice addon.

Author seems to be a little unhappy about critique. He deleted a comment on his website about those issues and also asked me to delete this review. However, I think users should know what this addon can do and what it can't.