Simplified Ctrl + V to Firefox

in the browser in experimental settings, there is an opportunity to include content insertion by means of clicks on the mouse wheel.

To enter these settings, you must enter in the address bar bout:config, and then click on the Accept risk and continue button.

Use the search field to find the value middlemouse.pastend toggle it to position rue.

Thus, you activate the function and can immediately recheck it in the browser.