As promised, Opera has released a public alpha of Opera 9.5 today. Aside from the juicy updates like full history search and bookmark synchronization, there are a ton of tweaks and bugfixes in the latest version of this web browser.

Here are a few goodies we found hidden in the release notes:

• Added an "open with" feature that lets you open pages with other applications including Firefox or Internet Explorer (for pages that still don't render well in Opera)
• Content blocking improvements
  
• Added an undo option for Speed Dial
• Improved thumbnail rendering quality
• Automatic page refreshing can now be overridden
• New brushed metal skin on the Mac version
• Dropped support for OS X 10.1 (Puma)

Remember, this is alpha software, so you might find a few unreported bugs. But you can also install Opera 9.5 alpha in a separate directory from Opera 9.23 so current Opera users won't lose any of their settings.