can't download videos from youtube wuth builtin browser

[jb]

It was working before the last few firefox nightly updates. I use latest nightly + flashgot 1.5.6.13rc1, i go to youtube, pick a video, right click the media button in the icon bars, select a video format, the download starts and stops immediately, download windows said failed. If a choose in flashgot options an external download manager (jdownloader) then it works. It affects only the firefox builtin downloader. It was perfectly working last week.

[therube]

Does Error Console provide any related clues on the failure?

Any change if you drop back to FlashGot 1.5.6.12 ? https://flashgot.net/feeds
Any change if you use FlashGot 1.5.6.13 with FF 45 (Release version)?

[jb]

Error console? the one with ctrl-shift-j gives nothing.

i can't go back to old versions of flashgot with nightly, it prevents installation of the xpi of your feed (and does not offer the allow dropdown)
but i succesfully run and use 1.5.6.13 with a previous version of firefox (light 42, a special firefox)

[NV]

I have the same on FF 20.0.1
Dropping back to FlashGot 1.5.6.12 solves the problem. Unfortunately I didn't look in error console, just tried the advice to drop back, so I don't know what had happened.