Computer: CPU feast

Maybe I should say "the Firefox Image Zoom extension c'est la mort".

I've had two computer related problems lately: 1. Something has been eating my CPU up totally. I've been thinking my computer is infected or just plain old (it is too) but when I tried using Internet Explorer yesterday not experiencing any problems at all, I became sure it had to do with the newest version of Mozilla Firefox. 2. The second problem had to do with not being able to resize images in Blogger and with images resizing themselves. I wrote and complained about it here.

Today I believe I found the problem! I was about to unwillingly leave Firefox for another browser when I thought I ought to try loosing some of the extensions first hoping they were the reasons. First I lost the ones I didn't really use anyway. When there were no result from that I turned to the ones I used and really liked. The first victim turned out to be the perpetrator as well - Image Zoom. It seams to have caused both problems. At least I hope so.
Also on the good side there are more than one zoom extension available.

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Blogger: Image posting problems

I have some problems ...posting images. That's a big problem 'couse, maybe you've noticed, I love images. Since a few days my images have decided to resize themselves and end up much smaller then they have to.

For example take a look at this post and then there's the last post where I wanted the images bigger than they are, filling up the whole post width. I have tried to click and drag them in the Compose mode without result and I've tried editing the code in the Edit Html mode but no dice. well, that is, I've managed to make some changes but not good enough.
Also when I made some changes in my sidebar under the headline "...and these" they suddenly ended up ridiculously small instead of filling out the whole sidebar width.

What's going on?? Have you had any similar experiences?

UPDATE:
CPU feast

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