"Opera 33 Quickly see which tab is playing sound with the audio indicator in the tab bar. Customize your keyboard shortcuts. Opera 33 Use mouse gestures to open links in a new tab or window or in a background tab. Opera 33 Enjoy a new look for the start page and Speed Dial. View an revamped history page directly from the start page. Opera 33 View the tabs you have open on other devices. Opera 33 Syncing service improvements with View and manage the Speed Dial start pages of your other devices in the bookmark manager. Improvements with Stability enhancements. Updated support for the latest Chromium/Blink release, version 42. Opera 33 Enhanced support for Chromium extensions."
"What’s New with Firefox 42 is Private Browsing with Tracking Protection blocks certain Web elements that could be used to record your behavior across sites. Control Center that contains site security and privacy controls. Indicator added to tabs that play audio with one-click muting. WebRTC improvements IPV6 support, Preferences for controlling Ice candidate generation and IP exposure, Hooks for extensions to allow/deny createOffer/Answer and Improved ability for applications to monitor and control which devices are used in getUserMedia. Login Manager improvements, Improved heuristics to save usernames and passwords, Edit and show all logins in line, Copy/Paste usernames/passwords from the Context menu and Migration imports your passwords to Firefox from Google Chrome for Windows and Internet Explorer; import anytime from the Login Manager."