How to get the url from current tab of firefox, without need to install additional software?

It's possible to get the current tab with xdotool: # set focus to address on browser xdotool search --onlyvisible --classname Navigator windowactivate --sync key F6 # copy address from browser tab to clipboard xdotool search --onlyvisible --classname Navigator windowactivate --sync key Ctrl+c # get off the focus from address from browser tab xdotool search --onlyvisible --classname Navigator windowactivate --sync key F6 # delivery of clipboard content to variable clipboard=xclip -o -selection clipboard # clear clipboard xsel -bc; xsel -c # echo URL of active tab of active browser echo $clipboard Since xdotool is buggy and sometimes fires keys without stopping with the code above, I need another way to do the same, perhaps with wmctrl. This is what I tried, using wmctrl on bash; it didn't work for me: id=$(wmctrl -l | grep -oP "(?<=)(0x\w+)(?=.*Firefox)") # set focus to address on browser xdotool key --window $id "ctrl+l" # copy address from browser tab xdotool key --window $id "ctrl+c" # delivery of clipboard content to variable url=xclip -o -selection clipboard # clear clipboard xsel -bc; xsel -c # echo URL of active tab of active browser echo $url