This is a recent problem. Whenever I want to save a picture from the web or upload a document from my computer to the web, I have been unable to do so because the respective windows won't open. For the saving pictures, I would right click and select "Save Images As" but nothing will happen. The window I want won't pop up. The same happens when I try to upload a document from my computer (such as a resume for a job application I'm trying to complete); I would click on the "browse" button but no window will appear, no matter how many times I click the button.

This problem is ONLY with Firefox. I'm not encountering this problem with any other web browser (Safari, Chrome, etc). My operating system is Windows 7. I don't know what the exact problem is or how to fix it. I'm not that computer savvy. I think it may have something to do with the new version because I've encountered this problem after I've installed the latest version of Firefox a few days ago.