+ Made the Groups.killNewTabGroup test a little tighter (in case someone has made a group called "new tabs")

+ Worked around bug 575672 (CSS transition assert)

--HG--
extra : rebase_source : 6f758e737c2092214ec3185be847f2c5da406be0

browser/base/content/tabview/iq.js

@@ -542,7 +542,9 @@ iQClass.prototype = {
         options = {};
 
       let easings = {
-        tabviewBounce: "cubic-bezier(0.0, 0.63, .6, 1.29)",
+        tabviewBounce: "cubic-bezier(0.0, 0.63, .6, 1.0)", 
+        // TODO: change 1.0 above to 1.29 after bug 575672 is fixed
+        
         easeInQuad: 'ease-in', // TODO: make it a real easeInQuad, or decide we don't care
         fast: 'cubic-bezier(0.7,0,1,1)'
       };