Why does Google Chrome leave running processes behind even after closing the browser?

There's an option in Chrome's settings to leave it running in the background if any apps or extensions require it. Most likely you're using such an extension and this option is turned on by default. Google Cloud Print will cause this too.

Go to TOOLS > EXTENSIONS menu. Uncheck / deselect ALL extensions you have installed (don't delete them, just deactivated all).

Quit Chrome and check if all tasks/processes were ended. If so, it means one or more of the installed extensions are causing this problem.

Now, activate one by one quiting Chrome and checking the processess for all of each of extensions activation. You will find which one is causing the problem.

In my case the problem "DvdVideoSoft Free Youtube Download 1.0.0.0" extension.

, I could see three Chrome.exe in the Task Manager. Why the processes aren't killed when the browser is closed?

They are. I can't simulate this.

As paradroid mentions - Atleast the eBay extension causes a Chrome process to remain open and adds itself to your system startup:

If you have this extension, I'd recommend you uninstall this. If you don't, disable all extensions and enable them one by one to find out the errant extension.

few times trojans were found in Chrome's cache folder.

I don't see how this is Chrome's fault.

I experienced this problem as well.

Situation:

I pinned a tab, every time I unpinned it, then closed chrome, a single chrome process would always remain in the task manager. I tried checking the "Background Apps Box", so nothing would have a chance of running and still no joy.

Fix:

• Unpin the tab.
• Close Chrome.
• Open your process manager/task manager - Hold Ctrl, Shift, and Esc.
• Look at the chrome process that remains and note the Mem Usage size.
• Reopen Chrome.
• Then end the chrome process with the same Mem usage size that remains.
• Close Chrome.

Keep this in mind... if you try to end the chrome task before you reopen it the settings don't get saved to memory. This is why you have to kill the process after you reopen.