My HP laptop does these things...
Some times when I move the pointer across the screen it will zoom out suddenly. Reversing the mouse pointer has no effect. Use of the zoom control - | nnn | + is necessary to zoom back in.
I can't paste this to where it needs to go.NoSquint
NoSquint brings more control to the zoom business by taking over the native zoom of Firefox. You can not only set the default zoom levels on a site by site basis or apply global settings; you can also change the text and background color to whatever suits you. Irritating backgrounds can also be disabled.
This is not related to the sudden zoom out problem.
Sometimes when I touch the mouse there appears very briefly around it expanding rings like ripples from a stone in the water. It's sudden and fast. I'm not able to associate this with any pattern of results- they are too small to notice.
There is one other annoyance that will not occur while I am looking for it.
Does anyone have any idea what is going on?