And why can't Firefox 7.0.1 handle it properly ?

All i got this " 400 Bad Request " error . The same page works fine under IE .

Sound like a Java thing - you may have to re-install the Oracle (as it is now) Java plugin for Firefox, I think...

Still got the same error .

I think .jsp is the extension of files in Java on the internet (like .html or .php).

Far as I know it's handled server-side so you shouldn't need a plugin. Must be something else.

Java Server Pages. They should be handled by the host and delivered to your browser as HTML though, so its odd that you're having issues with it.

http://en.wikipedia.org/wiki/JavaServer_Pages

Java that is run on a server. Somewhat similar to using PHP for webpages. This should have nothing to do with your end, but the site producing the page.

And before posting, I see I was ninja'd...

http://support.mozilla.com/nl/questions/759319

aka clear your cookies.

never mind , problem solved

Loads with no problem.