The Firefox browser tries to interpret anything containing a '.' as a website, even though many such things are clearly not valid websites. This makes searching for things containing a '.' inconvenient. A more intelligent check should be done, maybe a check to see if the text contains a valid public suffix (https://publicsuffix.org), since all websites should contain a valid public suffix. This is especially true since this list was originally created by Mozilla, i.e. they can easily integrate with it. Then searches containing '.' which are clearly not valid websites could be done from the URL searchbar.