[From bug #108809] <trees> appear to have a problem with oversized favicons (which we force to 16x16 via CSS) As an example, add the URL above into your bookmarks then, with favicons turned on in your preferences, visit that URL. You'll notice that the ICON isn't positioned properly. Note: As a temporary workaround, in "bookmarks.css" (in BOTH modern and classic skins), we added the following rule: max-width: 32px; /* 32 pixel hack to get too-large favicons to show; fix when tree becomes outliner */ which should be fixed up after <tree> is fixed, replaced by <outliner>, whatever.

fixed by 110156 tree conversion work