Mozilla.org has released Mozilla 1.8a3. This alpha release of the Internet software suite adds a preference to disable CSS, but most other changes are under-the-hood improvements. From the Mozilla 1.8 Alpha3 release notes:
Browser- Users can now disable CSS via Use Style > None or a global preference (bug 32372.)
- It is now possible to open a bookmark in a new tab with ctrl+click/middle click (bug 72361.)
Chatzilla
- Eudora import has been greatly improved (bug 242953 and bug 3157.)
Under the Hood
- ChatZilla now supports RTL text alignment (bug 250864.)
- Mozilla now supports a at-rule for matching on site/document URL. Among other things, this makes site-specific user style rules possible (bug 238099.)
- Mozilla has support for translucent windows on Windows and GTK2. (bug 252067 and bug 252525.)
- Preliminary support for CSS columns has been checked in to Mozilla bug 251162.)
- The new npruntime plugin scriptability API has been added to Mozilla 1.8a3 (bug 250666.)
- Undetected document.all support has been added to Mozilla. (bug 248549.)
Mozilla 1.8a3 is available for Mac OS X, Linux and Windows. Download links can be found on Mozillais releases page.