I have a problem with the pop-up window "open in another app?" The options being cancel or open. When I press the open button it does nothing. I can press the cancel button - that works or I can long press the link that I'm trying to get and open it manually myself. This problem with the open button has been getting worse over the last few weeks. It has now got to the stage where it doesn't work at all. I have emptied the cache for Firefox but this hasn't helped. Any ideas?