Firefox und eBay Suchseite

Hi,
I have problem with eBay sites, especially with eBay search options when I use it, or when I am trying to go to the 2. or the 3. site in my eBay "watched items", I have read some of the solutions here in the forum, and have done all of them, but still have the same problem!

I have reinstalled Firefox after I delete it's all files whitch remains in the computer after uninstallation, I have also reinstalled Java, also after deleting it's all files!

I have tried also to delete the cashe and cookies, but still have the same problem!

Can somebody help me?

Sorry to write in English, but u can answer me in German!

Thanks Boersenfeger.

I have installed it in the way you have told me. 3 times!!! but still have the same problem! :cry::roll:

When i use the search options in eBay, sometimes I have this error code:
Http/1.1 Internal Server Error
and sometimes this:

Http/1.1 Bad Request

but doing the same thing -I mean using the same search options- in Opera or IE is without any problem!

Is there anything else to do?!

My regards