Using Firefox 32.0.2, I cannot upload images in a post. This has been working well for months, but today after a Firefox update, it does not work. I click "Upload a File" and nothing happens. I checked Firefox options and block popups was selected. I unchecked this, restarted Firefox, but it still happens. The same thing happens when I try uploading a file in this post (on your forums). Works as usual in Internet Explorer.