Some extensions provide their own CSS code to format the output on the page. This is done, for example, with the extension felogin, by an instruction in the TypoScript:
plugin.tx_felogin_pi1._CSS_DEFAULT_STYLE = (here follows the CSS code)
The CSS code of the individual extensions is summarized and then stored in a CSS file in the typo3temp directory. This file is then automatically integrated into the source code of the website.
<link rel="stylesheet" type="text/css" href="/typo3temp/stylesheet_025c8758f5.css" />
In many cases, it makes more sense to store the CSS code in separate files and integrate them separately. To do this, you can display the CSS code in the browser and copy/paste it from there:
www.name-der-domain.de/typo3temp/stylesheet_025c8758f5.css
Now you have to make sure that TYPO3 no longer generates and embeds the file in the typo3temp directory. To do this, use TypoScript to delete the corresponding TYPO3 property for each affected extension. Example felogin:
plugin.tx_felogin_pi1._CSS_DEFAULT_STYLE >