The User Interface Does Not Open
FRITZ!Box 4020 113
Firefox
1. Click the “Menu” button and select “History / Clear Re-
cent History...”.
Or click “History” in the menu bar and select “Clear Re-
cent History...”.
2. In the “Clear Recent History” dialog, select “Everything”,
and under “Details”, check only the “Cache” option.
3. Click “Clear Now”.
Internet Explorer
1. Click the “Tools” button and select “Internet options”.
2. On the “General” tab, click the “Delete...” button in the
“Browsing history” area.
3. Enable the “Temporary Internet files and website files”
option and click “Delete”.
Google Chrome
1. Click the Chrome menu (“Customize and control Google
Chrome” button) and select “History / Clear browsing
data...”.
2. Select “the beginning of time”, and below it only the op-
tion “Cached images and files”.
3. Click “Clear browsing data”.
Other Web Browsers
If you use a different web browser, see the Help for your
browser for instructions on how to clear the cache.
Checking the Proxy Settings of the Web Browser
If a proxy server is enabled in your web browser, the address
of the FRITZ!Box must be entered as an exception. Check your
web browser settings.