This extension simply cannot fail to work in half of the pages, it's either works or doesn't work. Half of the pages means it's not being used properly. Most frequently conflicting software has been installed. Same as if it works 100% for one person how possibly it will work only in half of the cases for another person? My conclusion it's a defective user. It's about thousand people using this extension and less than five people experienced difficulties. I guess be proud.