Help Please! Firefox and Photoshop Crashing!

Hello.

I was wondering if someone could please help me. Firstly, I apologize if I didn't put this thread under the right place.

Here is the deal -

Yesterday I went on google images and firefox froze (which is unusual), anyway, I closed it. When I opened it again and clicked on another page it crashed. It kept crashing. So I looked up the problem hoping there was an easy fix. I disabled the extensions, and I ran it in safe mode but it still crashed. So I deleted firefox and all its folders. I noticed that in my mac finder instead of the 'search' and 'back' button there were now letters and numbers such as 'TL23' and 'TL9'. I have absolutely no idea why this is. So I just decided whatever, I will switch to Safari. -- I tried to open my adobe photoshop and it crashes before it even starts!

What does this mean? Does anybody have any suggestions??

Thanks in advance!