Update causes freeze.

[Weatherlawyer]

I updated sometime around last Sunday and noticed a different look on Firefox. Also the screen settings seemed different. Does Magea automatically resize my setting if it doesn't like them?

I am running Privacy Badger, Ghostery and Noscript.

My problem now is that if I manage to find a site that Firefox doesn't like, the whole system freezes. I have to pull the plug on it if I want immediate action. Ctrl+Q is inert.

Also when I reboot, every update since my installation shows up on the screen. That's been happening since I can recall. Similarly when I reboot. I also have to catch the memory check, can't seem to find out how to switch that off in BIOS.

Any help will be appreciated.

[doktor5000]

I updated sometime around last Sunday and noticed a different look on Firefox. Also the screen settings seemed different. Does Magea automatically resize my setting if it doesn't like them?

It's not Mageia, default settings are provided by Firefox. And with the last update you probably jumped from Firefox 24ESR to Firefox 31ESR - which includes the new Australis theme and a completely new look. Which can be changed, just google around and use a different theme that suits your taste better.

My problem now is that if I manage to find a site that Firefox doesn't like, the whole system freezes. I have to pull the plug on it if I want immediate action. Ctrl+Q is inert.

How do you establish that the system is frozen? And what should Ctrl+Q achieve? That does nothing here.
Can you still switch to a tty via Ctrl+Alt+F2 - F6 ? Can you press Ctrl+Alt+Backspace to restart the X server?
If you have xkill installed, can you press Ctrl+Alt+Esc and click on Firefox?

FWIW, it's nearly never required to "pull the plug" and that's not healthy to your hardware.

Also when I reboot, every update since my installation shows up on the screen. That's been happening since I can recall. Similarly when I reboot. I also have to catch the memory check, can't seem to find out how to switch that off in BIOS.

How is this related to firefox? You seem to jump from one topic to another. As a general hint and golden rule: Please only one problem per thread.
For the sake of it:
- where do the all the updates since the installation show up on screen, and at what time? Can you do a screenshot for that?
- for the memory check, you should read your BIOS manual - as you didn't provide information what BIOS or what computer you use, can't help you with that.