Firefox Update has borked all my favourite addons

[#1]

Just a quick heads up

(that I forgot to do earlier)

https://www.mozilla.org/en-US/firefox/66.0.5/releasenotes/?utm_source=firefox-browser&utm_medium=fir...

66.0.5 is in the shops now!!;)

Further improvements to re-enable web extensions which had been disabled for users with a master password set (Bug 1549249). More support information

[#2]

Already running 66.05 .... probably updated itself, without me knowing...but since the "fix"  last week,  everything has been working alright

Thanks

[#3]

Very true but for some reason the old bug playing Youtube videos (stutters and slow loading) seems to have come back. Not a happy bunny. Still Opera works ok.

[#4]

There was a message at the bottom of the screen when I launched FF (latest version) today saying it was slow to open, and offering me the option of clicking a 'Refresh' button or something to speed it up.  Since I had just switched on the computer and it was still finishing whatever it does on boot-up, I didn't think FF was any slower than usual so I didn't do as suggested.  Also I think it said Favourites and History would be preserved, but I'd have reselect add-ons.

[#5]

I've loaded the Youtube classic add-on, seems to work fine now.

@Jonpe I would be very wary about doing any 'refresh'. Usually means a clear out. Last time it cleared all my cookies. It really is wonderful when every site asks for username / password to log back in. Now where/what are they. I try not to go there anymore.

The other option I fire up every so often is 'Firefox nightly' (nightly update channel, currently version 68.0a1) and strange to say, Youtube plays normally on today's version.