When setting up Speed Kit through our installation wizard you will be asked to copy the service worker ("sw.js") as well as a code snippet into your site. This article explains where Joomla users have to paste these two files.
First, you have to be logged into your Plesk account.
To save the Service Worker (sw.js), navigate to:
Domains -> Your Domain -> File Manager -> [your root directory] (usually "httpdocs")
... and save the file there.
To save the code snippet, in your Joomla backend, navigate to:
Extensions -> Templates ->Styles -> the current template you are using (with the star) -> index.php -> Paste code between <head> </head> tags
This video shows you these steps in practice:
Please also make sure to blacklist your admin page ("/administrator"), in order to be able to use it:
blacklist: [ { pathname: [ "/administrator" ] }