The Opera desktop team has released another update for Developer 25, this update mainly focuses on Mac. Experimental/new start page has been enabled and you can see it, when you open the New Tab Page. 64-bit Chrome for Mac is already available, so as the 64-bit Opera for Mac now (but on developer channel). No 64-bit for Windows yet?.

Opera integrates Chrome PDF Viewer into the developer Stream

64-bit Opera for Mac

"We held off on switching Mac to 64-bit until the benefits outweighed the downsides. Today, we think we have reached that milestone." Ruarí Ødegaard, works as a team lead for Linux and Mac at Opera said on the desktop team blog.

The changes that allowed them to switch to the 64-bit version are:

New 64-bit only API possibilities, with the upcoming release of Yosemite

Speed and security improvements – find out more on the Chromium blog

H.264 video now enabled on Mac, to support the transition from plug-ins

While WebM continues to work for all users, but H.264 support is only available on Mac OS X 10.9 (Mavericks) and Opera like Apple, no longer supports Snow Leopard.

Opera 25 Developer Update Enables the Bookmark Manager

New Start Page

The new Start page is quite awesome, when you see the old start page in the stable version, you can notice Speed dial, Stash and Discover buttons on top, these have been moved to the left sidebar in the new one. You can see the order as Speed Dial, Discover and Bookmarks.

No stash? A visual way of bookmarking the pages has been removed, probably it won’t be available in future versions and could be merged with the Bookmarks.

Opera new start page

Opera 24 Developer Update Enables H.264 Video Support for Windows

You can switch to the old start page from the new one by clicking on the triangle provided at the bottom right corner of the page.

If you don’t like the new start page, you can turn it off and go back to the old one by disabling experimental start page in about:flags page.

What’s your take on this update?