The main thing I’ve done with this version is (hopefully) finally solved the duplicate bookmarks problem. I’ve done this via two changes.

1. If a bookmark being added exactly matches another bookmark in the same location, it is removed
2. I’ve added a new option to do the same thing if the title of the bookmark is the same (so you can change URLs).

Another new feature is the ability to prevent add-ons from being hidden or disabled based on their ID. You can add these IDs on the add-ons page in the CCK2 Wizard. To find out the ID of an add-on, you can unzip the add-on’s XPI file and look in the file install.rdf.

As far as bug fixes go, they are:

• Prevent installation of XPIs in about:addons via drag/drop.
• Mark CCK2 and generated XPIs as multiprocess compatible (because they are).
• Stop using a sync XHR for certificate overrides at startup. (This was causing startup hangs.)
• Add extra validation to the config name so we don’t end up with bad characters.
• Ignore errors when there is no crash reporter so the CCK2 works on Linux with the crash reporter disabled.
• Workaround bug 1338154 by adding text at the beginning of resource paths.
• Remove an unused function to prevent a warning error.
• Turned off the upgrade page

You can click here for more details about the release and to download it.