Using the App-Editor
The CrosManager App Editor can be used to change icons and features of a Progressive Web Application (PWA).
After granting Context Menu permissions, you can right-click on any web page and select the "Edit App Manifest" option. (Please note, this will reload the page.)
Once the editing script is loaded in, a small window will popup with all the editable fields of a PWA manifest. Change the items to match your preferences, and then click save.
Should you change your mind and wish to delete your changes, simply press close instead.