I have used the Firefox for Android app on my Samsung Galaxy S3 Mini for over a year and it's worked fine until yesterday. Now I discover that some responsive menus that worked perfectly until then don't open or react at all. This means I can't browse the sites. The ones I know about are all built on the Joomla! 3.4.5 platform. See phone screenshots attached. The one showing the open menu was opened with Opera Mini.