You should allow the individual files in the “Allow direct access to these files” section of the .htaccess Maker. This applies to any and all files in the site's root — except for Joomla's index.php — you need to allow access to.
It should also be noted that it's best to not have the site ‘favicons’ images stored in the site root. It's best to have them in the media subdirectory for your template, a subdirectory of the images folder, or a subdirectory in your template folder in this order of preference. Also note that you should not expect browsers to “discover” these files, you should explicitly state them in the HTML output of your site either by modifying your template directly or by using a third party extension. ‘Favicons’ are communicated through <link> tags in the header and include not just the file name but also the resolution of the image.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!