The Mozilla Foundation has released the first official release candidate of the upcoming Firefox 1.5 release. Compared with the previous betas, this release contains mainly bug fixes to polish the product up for release. Those who still use Firefox 1.0 will notice some big changes, including: automated update (including extensions) with smaller patch sizes, faster browser navigation (by more aggressive cache rendered pages), drag and drop reordering of tabs, improved pop-up blocking (including plug-in triggered), clear private data, new options window, better accessibility, report broken site feature, improved and newly added support of web standards and security improvements.