Greasy Fork镜像 is available in English.
It preserves YouTube's progress bar always visible even if the controls are hidden.
< YouTube ProgressBar Preserver 피드백으로 돌아가기
great, I used another firefox add-on for this, but this script works better.
(๑'ᴗ^๑)*
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great, I used another firefox add-on for this, but this script works better.