browser features fixed for FF24

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8887 5f5364db-9458-4db8-a492-e30667be6df6
testcase update

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8888 5f5364db-9458-4db8-a492-e30667be6df6