Does it still happen in Troubleshoot Mode?

Yes thanks for the idea, I tried it in troubleshoot mode and it still does happen.

Try clearing cookies and disabling Tracking Protection for the site.

No that didn't do it either, thank you.

Does it still happen in a new profile? An easy way to test a new profile is to install Developer Edition and see if it happens there or refresh your existing profile.

Thank you very much, it works perfectly in Firefox Developer Edition.

It also resets the correct episode etc. in regular Firefox, but then if I watch it there again, it doesn't hold its place anymore.

At least I can use it in Developer Edition now and don't have to use Chrome or any other browser.

Thanks again, I really appreciate it.

Is the video on your watchlist? If not, you need to add it.

Did you try it in release Firefox with a new profile?

Keep in mind that DE updates twice per week and is more aimed at developers that want to check out and test new developer features.

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

• https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

If the new profile works, you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile