It works well and saved me a lot of time, although I found a really annoying bug that stops the progress bar from working when using it on Firefox. It won’t show any elapsed time and will only indicate your position in the video when you hover over it to see the red dot. The only fix I’ve found is to completely reinstall or disable the extension, and even then, that only works for like an hour or two. Please fix this! I don't wanna go without the extension but I can't STAND this bug!