Trying to retrieve old version of a css file in Firefox

Accidently overwrite the css file

[12inch]

I accidently have overwritten a CSS file. I don't know how it happened, but now half of the CSS definitions are missing.

Now I have my Firefox opened with the HTML file opened that displays the correct CSS. But when I do a reload, it will show the new and wrong CSS, the one with all the definitions missing.

Does anyone know how I can retrieve the CSS that is now loaded in the HTML page?

I have tried to view the CSS in Firefox, but it shows the new one. I have tried it with the Web Developer extension, but it also shows the new one. I have tried it with about:cache and then searching for the css file, but all it does it referring to the online css file. There must be a cached file of the css in the cache directory...

I also tried looking in the cache directory and renaming some files with the same file size to the css filename. But that also didn't work.
[tweakguides.com...]

I hope anyone can help me out!

Anand

[12inch]

I managed to solve the problem. I tried everything but I forgot to look in Dreamweaver where I had the css opened. All I had to do was to do serveral undo's.