Firefox is 32 bit.

On a Mac, Firefox 4 versions and later are a 64 bit application (i386/x86_64 universal binary).<br /> If you have plugins that only work in 32 bit mode then you need to start Firefox in 32 bit mode to use such a plugin. Don't you see "Open in 32-bit mode" ? Can you attach a screenshot? *http://en.wikipedia.org/wiki/Screenshot *https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem Use a compressed image type like PNG or JPG to save the screenshot. ---- You can use these steps to start Firefox in 32 bit mode: # Close Firefox # Start the Finder and open the Applications folder # Right click or control-click the Firefox.app icon # Select "Get Info" # Select or Deselect "Open in 32-bit mode" # Close the "Firefox Info" window # Restart Firefox See also: * http://macstuff.beachdogs.org/blog/?p=134