I was very upset seeing this when it automatically updated yesterday where I had to replace the program and profile from a backup:
Contemptable spammy behaviour: Suddently dimming the background which hurts my eyes in the process and thereby obscuring cutting me off from the contents which I find rude and disrespectful. This is one reason why I decided to not to try the later editions past 89/95? where it started to happen excessively. It would do this on prompts,offers (that i thought I disabled before) and I absolutely despise this behaviour with interfering with the background. Why can't they leave the contents alone like before.
I thought in June last year let's leave some feedback.
The feedback button redirected to this site:
Firefox feedback leads me to:
https://mozilla.crowdicity.com/Signed up, started a suggestion on a potential issue, it was still waiting moderator approval a couple of months or so later and it seems to have been removed.
GONE:
Complete waste of my time so no point in leaving feedback there.
I felt a bit disheartened with it being removed like that.
My irrational paranoia tells me: Some arrogant person up there (who thinks thy are better than everyone else) decided to start put DIMMING OVERLAYS over everything found "my idea" and had it removed without giving it a chance for others to vote. So my idea is not up for discussion or votes when they feel like it. More like their idea is suppose to be my idea.
I suppose could go on the support pages where they comments and
complain ask for a solution.
There are other things I am not happy about Firefox 78+ is with pages/messages like this that I find insulting and the arrogance I see:

We're? It is not we're. it's not human. I find it very insulting and puts me off. Like I am somewhat stupid and confused, don't know what I am doing and they expect me to think it is human and it can think as if it was "smarter" than me. I don't find the messages and notifications from the two other browsers Vivaldi and Firefox 22 (attached) insulting. They look respectable to me. Palemoon 28 has the same connectivity page/notification as Firefox 22.
Those are some of the reasons I don't use Firefox 75+ often but I have been trying to gradually alter it to make to look and behave more the way I want it to behave but I found Vivaldi 3 and 3.8 was so much more easier to customize and has been serving me very well for two years.