The new version of Mozilla, 1.1, is released for many operating systems. Release notes here. Opinion: Check the screenshot, showing Mozilla’s slow UI (XUL) performance on a dual Celeron @ 533. Before you comment on it, please read the already published comments, because we explain more over there. Update: I added a comment with the image attachment on Mozilla’s BugZilla. There was already a bug entry for this, which suggests more people having problems with this behavior. See? I am not mad… Update2: And here is another bug submitted by someone else, with the same problem, and his shot. His bug is marked as “Verified”. But it is still not fixed.