My fire fox „hang” during taping „www”. Usually I’m able only to tape one “w” and fox is stopped. I tried to reinstall it and nothing had changed.

This should not happen. It might be an indication that something is wrong with the database storing your history and bookmarks, causing Firefox to hang when trying to read through your history (which is what it will try to do when you type in the address bar, to show you your most frequently visited sites).

A cool new feature in Firefox 13 is called "Reset Firefox", and it allows Firefox to fix issues like this easily with just a few clicks. Follow this article to try this out: https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems

(Btw, it looks like you're still on Firefox 12, so your first step should be to upgrade. Firefox normally does this automatically after a while, but you can force it by selecting the Firefox button at the top right corner, then point at Help, and then click About Firefox.)

Do you have inline autocomplete enabled?

• http://kb.mozillazine.org/Inline_autocomplete

A possible cause is a problem with the file places.sqlite that stores the bookmarks and the history.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
• https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

You can also try to repair the places database with this extension:

• https://addons.mozilla.org/firefox/addon/places-maintenance/