You are welcome.
Some possible explanations: the site(s) made comforting changes, and/or an extension was somehow implicated - and it was upgraded/updated (AbP filter subscription auto update...?), and/or maybe, though I am not certain of this - your "browsing"/usage load has been sufficiently different.
In any case, glad to know that there is less diaper rash, at least in East Puddle, now....
I am very happy that I now very rarely see this error, especially when it used to occur on pages that had been set to timed auto-reloading, some of which were rather large, and would bog down Fx, and more...