If you enter a web address (URLs) into the Firefox Location bar, then press the Enter key and nothing happens, this problem is caused by an extension that you or another program has installed. (Usually AVG)

• For more information on the Location bar, see Address bar autocomplete suggestions in Firefox.

Disable the faulty extension

To determine which extension is causing your problem, follow the instructions in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article.