Try exiting Firefox via the 3-bar menu button -> Exit. I've found that using the close button in Firefox instead of the Exit button will leave a ghost Firefox in your Task Manager. Since I've started going the latter route, I haven't had this issue.

How do I add close button to this?

https://addons.mozilla.org/en-US/firefox/addon/quit-firefox/ Quit Firefox Quit Firefox provides statusbar and Toolbar buttons to quickly shut down Firefox. It is especially useful for laptop users.

How to crash Firefox (All Systems); Instructions here; https://developer.mozilla.org/en-US/docs/Mozilla/How_to_report_a_hung_Firefox

This link has a program that can crash Firefox.

Sometimes when FF is closing, not all of it shuts down properly.

Moses said

Try exiting Firefox via the 3-bar menu button -> Exit. I've found that using the close button in Firefox instead of the Exit button will leave a ghost Firefox in your Task Manager. Since I've started going the latter route, I haven't had this issue.

Where is this button ,it's not in my 3 bar?

tfinniii said

Moses said

Try exiting Firefox via the 3-bar menu button -> Exit. I've found that using the close button in Firefox instead of the Exit button will leave a ghost Firefox in your Task Manager. Since I've started going the latter route, I haven't had this issue.

Where is this button ,it's not in my 3 bar?

It's in the lower right corner, right next to the help menu (the '?').

I'll try that next time I have to shut down,thanks.