It should be mentioned that Firefox, though no manipulation of my own, is now back up and running.
When it activated all of my add-ons, along with their associated websites. I had to go in and turn off the add-ons not currently in use. It did surprise me there were so many. I am a taster. When I find mention of something that may make the browsing experience more interesting, will try it. Mostly the reason I turn it off as to do with loading time or its conflict with a already running feature. I only delete the ones that have an obvious detrimental effect on my set-up.