Yup, I'm also less active on SCforum in the recent period... changed job, duties with little daughter
(second one - older daughter, now lives outside of Country), etc.
A little bit difficult period in my life... because of that I reply with huge delays.
... but you can notice that Crypto part of the site have a significantly active life.
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A - I suppose that J. also have a lot of news in life... I sent him Private Message regarding our conversation, hope He will reply soon.
B - Please attach some screenshot regarding this error. By the way, recently I discovered this App - Lightshot, maybe you'll find it useful as well or maybe you already use it:
https://app.prntscr.com/en/index.htmlC - Take a look on these extensions
(more or less related to your question): https://addons.mozilla.org/en-US/firefox/addon/video-audio-downloader/ https://addons.mozilla.org/en-US/firefox/addon/any-video-downloader/ https://addons.mozilla.org/en-US/firefox/addon/audio-to-mp3/ FYI, now I 99% of time use Chrome.
D - If I understand correctly, maybe this App will help - KODI:
https://kodi.tv