Today I downloaded the latest Firefox browser and I am very unhappy that the task bar at the bottom of my screen (which was there in the previous version of Firefox) is now gone. How do I revert back to the previous version of Firefox because this new version is not suitable to my needs. The loss of the task bar is a serious flaw in the new version of Firefox, but the new version also behaves oddly in self-resizing for a full-screen view when I actually want to keep all the tabs appearing at the top of all browser pages in Firefox at all times. So, I want to revert back to the previous Firefox. A third thing is I lost all previous opened tabs in the previous Firefox merely because I updated to the new version of Firefox. Just tell me now how to revert back to the older and much-better version of Firefox. Thanks.