Chrome: The browser extension Google+ Ultimate adds a notification counter with dropdown, fixed floating navigation, and an optional side-by-side stream view along with other tweaks.
The extension's current full list of features include:
- The notification counter is helpful when not at a Google website. You can click on it to view your notifications just like you can on a Google site.
- Fixed floating navigation for the top and left bars means that you'll have access to your icons, streams and sparks no matter how far down you scroll.
- Ultra-compact navigation puts all of your navigation options in the menu bar. This is meant to be used on larger widescreen displays.
- Optionally reduce image sizes in your stream.
- Optional side-by-side view of your stream.
Google+ Ultimate is a free browser extension in the Chrome Web Store.