I have recently updated to Firefox 4. I am having many problems with this version. I am unable to use Facebook properly. The Facebook screen resolution changes every time automatically. The screen resolution gets very big. When I open the FB site the resolution will be fine as soon I open another tab to check other website and roll back to the FB tab the screen resolution gets big and can't get back to normal view. I have to close the FB tab and open a new tab to put the FB URL to use it. When I try to view other tabs and then open the FB tab the screen resolution is changed. I have problem with only FB on Firefox 4, other websites are working fine. I also tried opening FB on IE8 and Chrome. Their the site is opening normal. Have no issues with their browsers. I spotted it to be a problem with Firefox 4 and also the IDM (Internet Download Manager) doesn't work on the FF4 where it used to work on the earlier version of FF. Do something about the IDM integration with FF4 to download FLV,MP4 videos from YouTube and other websites. There is no "Go back to multiple pages" button in a FF4 tab. It only allows us to go back to the previous page. If I have open 10 pages in a single tab then I have to click the back button 10 TIMES to open the last (10th page) but in the previous FF3 there is a facility to view all the pages in a drop down which the current version of FF4 doesn't have :-( I am using Windows XP 2 Professional 32-bit and owner of the computer. Please fix the issues asap else I have to move back to the earlier version or have to shift to some other browser : Here goes the screenshots : http://i55.tinypic.com/2s8s8c6.jpg http://i51.tinypic.com/j7vynq.jpg http://i55.tinypic.com/1yuwbq.jpg