I've been having this problem with Firefox and I though I'd finally try to figure it out. Keep in mind this happens almost every time the circumstances are right, and not EVERY time. I'm using the newest version of Firefox, though this has been happening the last few versions. I'm running Vista.
I have two problems;
1. When downloading something, the link will not prompt the download dialog box (with opening and saving options) unless I open it in a new tab/window.
2. Pressing "Back" while a page is loading makes the tab unusable. Reloading or pressing "Back" or "Forward" does nothing. The dialog on the bottom of the Firefox window says "Stopped". The only way to fix it is to close the tab and open it as a "Recently Closed Tab" (Ctrl + Shift + T).
Solutions to this problem do not include "stop using Firefox" or "stop using Vista", though I know that I will see these responses anyway whether you read this or not.
Thanks in advance.
