Mozilla has released Firefox 20, and for the first time you can open a private browsing window without closing every tab that’s currently open in your browser. Firefox 20 adds support for per-tab private browsing.
Private browsing lets you surf the web without your browser saving your history, cookies, or other data. This lets you look up information of a sensitive nature without worrying that you’ll forever be inundated with advertisements about fungal infections, shop for birthday presents without alerting your spouse, or do… other things. There’s a reason many folks refer to private/incognito mode as “porn mode.”
For as long as Firefox has offered a private browsing option, the web browser has saved all of your open tabs so that as soon as you exit private mode all of your web pages will reload. But now you don’t have to close a tab just to open a new private tab.
Firefox 20 for PC also includes a new Download Manager which lets you view downloads by tapping a button in the toolbar. You no longer have to switch to a new window just to see a list of downloads. And you can now close frozen plugins without crashing the web browser.
The Android app also now supports additional devices… including phones and tablets with ARMv6 processors.
via The Mozilla Blog