Hello For information purposes. An subject. https://connect.mozilla.org/t5/discussions/firefox-136-custom-homepage-custom-shortcut-image-url-super-slow/m-p/90635/highlight/true#M35159 about:profiles https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles#w_manage-profiles-when-firefox-is-open <blockquote>Note: The Root Directory stores user profile data such as bookmarks, passwords, and preference settings. The Local Directory stores the disk cache and other temporary data. </blockquote> For information purposes, take a look at the local directory and go to thumbnails folder.

An similar subject https://connect.mozilla.org/t5/ideas/upload-shortcuts-image/idi-p/5144