Youtube - Progress Bar Missing


When I open Firefox -> and log in, I can't see a progress bar (red) on video thumbnails. Instead I can see 'WATCHED' tag that is greyed out. How to get the progress bar back?

Btw when I open Google Chrome there is no issue and I see the progress bar under my account.

Thanks for any help.
LVL 13
Hello ThereSystem AdministratorAsked:
Who is Participating?
Hello ThereSystem AdministratorAuthor Commented:
Found this:
go to Options, Cookies, search for “youtube” and delete all the cookies

Well, I've spent an hour trying to solve this.
This has nothing to do with old version of Flash Player or bad configuration (Firefox -> type 'about:config' to the URL bar -> search for 'media.mediasource.webm.enabled = false' -> change to true). It's a known bug.

Solution 1: Go to -> click on the green lock in the URL area -> click on the arrow -> More -> Security Tab -> Show Cookies -> Delete All Cookies

Solution 2: Firefox -> Options -> Privacy and Security -> under History section go to 'Show Cookies' or 'delete individual cookies' (depends on your settings) -> delete all YouTube cookies
Hello ThereSystem AdministratorAuthor Commented:
But for sure, check '' if all players are enabled. If not, type 'about:config' to the URL bar -> search for 'media.mediasource.webm.enabled = false' -> change to true.

Note: It might happen when you clear the Firefox history and delete cookies and cache.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.