Buffers the video without autoplaying and puts it in HD if the option is on. For Firefox, Opera, & Chrome
< YouTube Auto Buffer & Auto HD 피드백으로 돌아가기
Sorry, the problem is solved, I found settings
there is >
Yep, there's that, and there's also Tools > Greasemonkey > User-Script Commands
Where can I find the settings pop-up window, that appeared once, at the first opening of YouTube?
add screenshot please? where this settings&
Firefox browser