diff --git a/chrome/skin/default/zotero/spinner-14px.png b/chrome/skin/default/zotero/spinner-14px.png new file mode 100644 index 000000000..ecdb444ec Binary files /dev/null and b/chrome/skin/default/zotero/spinner-14px.png differ diff --git a/chrome/skin/default/zotero/spinner-16px.png b/chrome/skin/default/zotero/spinner-16px.png new file mode 100644 index 000000000..d7e1c739b Binary files /dev/null and b/chrome/skin/default/zotero/spinner-16px.png differ diff --git a/chrome/skin/default/zotero/spinner-16px@2x.png b/chrome/skin/default/zotero/spinner-16px@2x.png new file mode 100644 index 000000000..e3d5ed450 Binary files /dev/null and b/chrome/skin/default/zotero/spinner-16px@2x.png differ