Close existing firefox process linux

How to gently kill firefox process on linux/os x?

In Linux and OS X, it may be necessary to gently kill the Firefox process if it becomes unresponsive or stuck. This can be done through various command line tools, such as the kill command or the pkill command. Below are some methods for gently killing a Firefox process on Linux and OS X.

Method 1: Using the Kill Command

To gently kill the Firefox process on Linux/OS X using the kill command, you can follow these steps:

1. Open the terminal application on your Linux/OS X system.
2. Type the following command to find the process ID (PID) of the Firefox process:

Here are some example commands:

ps aux | grep firefox kill -15 1234 kill -9 1234

In summary, to gently kill the Firefox process on Linux/OS X using the kill command, you need to find the process ID of the Firefox process and then send a SIGTERM signal to ask it to close gracefully. If Firefox does not close, you can send a SIGKILL signal to force it to close.

Method 2: Using the Pkill Command

To gently kill the Firefox process on Linux/OS X using the pkill command, follow these steps:

1. Open the terminal on your Linux/OS X system.
2. Type the following command to list all running Firefox processes:

Here’s an explanation of the pkill command options used in the above examples:

• -15 sends a SIGTERM signal to the specified process, giving it a chance to exit gracefully.
• -9 sends a SIGKILL signal to the specified process, terminating it immediately.

Note that the pkill command can be used to kill any process by specifying its name or PID (process ID) instead of firefox .

Method 3: Using the Killall Command

1. Open the terminal on your Linux/OS X system.
2. Type the following command to kill Firefox process gently:

This command sends the SIGTERM signal to the Firefox process, which allows it to terminate gracefully.

1. If Firefox is unresponsive or taking too long to close, you can use the following command to force it to close:

This command sends the SIGKILL signal to the Firefox process, which forces it to terminate immediately.

This command returns the process ID (PID) of the Firefox process. If it returns nothing, then Firefox is not running.

1. If you want to kill all instances of Firefox running on your system, you can use the following command:

killall -SIGTERM firefox-bin

This command sends the SIGTERM signal to all instances of the Firefox process.

1. Finally, if you want to force all instances of Firefox to close, you can use the following command:

killall -SIGKILL firefox-bin

This command sends the SIGKILL signal to all instances of the Firefox process, forcing them to terminate immediately.

Remember to use these commands with caution, as they can cause data loss if Firefox is not saved properly.

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How to kill firefox from command line

All in vain. The output of

ps aux | grep -i firefox | grep -v grep 

v 2419 1.7 7.7 4026824 458876 ? Sl 12:56 0:51 /usr/lib/firefox/firefox -new-window v 2483 0.0 0.6 190540 38684 ? Sl 12:56 0:00 /usr/lib/firefox/firefox -contentproc -parentBuildID 20210927210923 -prefsLen 1 -prefMapSize 246254 -appdir /usr/lib/firefox/browser 2419 true socket v 2515 0.0 2.0 2407620 119704 ? Sl 12:56 0:01 /usr/lib/firefox/firefox -contentproc -childID 1 -isForBrowser -prefsLen 102 -prefMapSize 246254 -jsInit 286204 -parentBuildID 20210927210923 -appdir /usr/lib/firefox/browser 2419 true tab v 2553 0.5 2.6 2572708 156816 ? Sl 12:56 0:16 /usr/lib/firefox/firefox -contentproc -childID 2 -isForBrowser -prefsLen 268 -prefMapSize 246254 -jsInit 286204 -parentBuildID 20210927210923 -appdir /usr/lib/firefox/browser 2419 true tab v 2581 0.0 1.6 2406928 99740 ? Sl 12:56 0:01 /usr/lib/firefox/firefox -contentproc -childID 3 -isForBrowser -prefsLen 4889 -prefMapSize 246254 -jsInit 286204 -parentBuildID 20210927210923 -appdir /usr/lib/firefox/browser 2419 true tab v 2612 0.3 3.7 2648096 225204 ? Sl 12:56 0:09 /usr/lib/firefox/firefox -contentproc -childID 4 -isForBrowser -prefsLen 5588 -prefMapSize 246254 -jsInit 286204 -parentBuildID 20210927210923 -appdir /usr/lib/firefox/browser 2419 true tab v 2866 0.0 1.2 2373260 72628 ? Sl 12:58 0:00 /usr/lib/firefox/firefox -contentproc -childID 5 -isForBrowser -prefsLen 5701 -prefMapSize 246254 -jsInit 286204 -parentBuildID 20210927210923 -appdir /usr/lib/firefox/browser 2419 true tab v 2998 0.0 0.6 194220 39176 ? Sl 13:12 0:00 /usr/lib/firefox/firefox -contentproc -parentBuildID 20210927210923 -prefsLen 5926 -prefMapSize 246254 -appdir /usr/lib/firefox/browser 2419 true rdd 

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Can I close firefox browser tab or firefox browser from ubuntu terminal?

From the Ubuntu terminal you can’t close the tabs of Firefox, but you could close the tabs of Chrome browser.

3 Answers 3

Option 1. wmctrl

wmctrl can query the window manager for information, and it can request that certain window management actions be taken. (wmctrl manual)

For closing firefox gracefully, wmctrl could do the trick—

wmctrl -c "Firefox" -x "Navigator.Firefox" 

you may need to install it first with

Caveat #1

wmctrl -c only closes one window at a time. If you have multiple firefox windows open, you will need to run wmctrl -c multiple times.

Example Solution

while wmctrl -c 'Firefox' -x 'Firefox.Navigator'; do sleep 0.1; done 

Caveat #2

If browser.tabs.warnOnClose is set to true, Firefox will prevent the window from closing. This can be changed in about:config , but that is a compromise to your Firefox user experience which may not be worth the risk.

Option 2. xdotool

xdotool lets you programatically (or manually) simulate keyboard input and mouse activity, move and resize windows, etc. (xdotool man page)

ZyMOS was the first to suggest this solution. I’m simply building on their answer by adding additional logic to handle the possible appearance of the close confirmation window.

Example Script

#!/bin/bash # # TITLE: close-firefox.sh # # DESCRIPTION: Programmatically closes firefox in a way # similar to how a human closes firefox. # Find the window ID of a Firefox window. FFWID=$(xdotool search --name "Mozilla Firefox" | head -1) # use the Firefox window ID to activate that window xdotool windowactivate --sync $FFWID # Send the "Quit" hotkey "Ctrl + q" to Firefox. # https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perform-firefox-tasks-quickly xdotool key --clearmodifiers ctrl+q # Give the system a moment to process sleep 0.1 # Find the window ID of the Firefox close confirmation window CWID=$(xdotool search --name "close tabs") # End the script if xdotool didn't detect a confirmation window if [ $? -ne 0 ]; then exit 0 fi # Activate the Confirmation window xdotool windowactivate --sync $CWID # Send an "Return" key press to the confirmation window. # This does the default action of pressing the "Close tabs" button. xdotool key --clearmodifiers Return 

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