According to devdocs of magento 2.3.0 I tried to add a favicon manually.
https://devdocs.magento.com/guides/v2.3/frontend-dev-guide/themes/favicon.html
Attempt 1:
/magento2/app/design/frontend/Magento GJ/theme-GJ/Magento_Theme/layout
=> here goes the default_head_blocks.xml file
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<head>
<link src="Magento_Theme::favicon_32x32.png" rel="icon" type="image/x-icon" sizes="32x32"/>
</head>
</page>
/magento2/app/design/frontend/Magento GJ/theme-GJ/Magento_Theme/web
=> here goes the favicon_32x32.png file
=> This works only in Firefox!
Attempt 2:
Then I tried just for fun to add in the root directory my own favicon.ico.
/magento2/app/design/frontend/Magento GJ/theme-GJ/Magento_Theme/
=> This works for Safari, Chrome and Edge. The IE does not work.
Attempt 3:
According to the magento 2.3.0 bug to add a favicon over the backend I solved this issue also:
Magento 2.3 favicon and logo upload does not take hold
Then I tried to upload my favicon. => All browsers can handle the favicon.
I want to know why the first attempt does not work for all browsers? - I am at a loss :/
