For each of the browsers below, click on the 'Tools' tab at the top of the browser window. (You can use the window you're in right now) Follow the instructions below, click 'OK' (not 'Reset'), and then refresh or restart the browser.
Firefox:
Internet Explorer:
Netscape Navigator:
If you are using a different browser, or an older version of the above, the instructions may be slightly different, but they will be similar.