The previous version of Flashgot (188.8.131.52) works fine on YouTube. It normally finds around 20 file options to download. However, in the new version 184.108.40.206 (which typically automatically updates in Firefox), it only finds .webm files, typically around 2 to 4 files. No .mp4 files, so no way to download the video. I hope this bug is being worked on because every time I open my browser, I have to go to the Flashgot page and find the old version to install. Thanks!
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0