There is a simple keyboard shortcut, if you have copied formatted text and want to paste it into the فائر فاکس browser as unformatted text.
To paste the text as unformatted plain text into فائر فاکس browser, press the following keys:
کے لئے Ctrl + شفٹ + V
No extra plugins are required. This was tested in Firefox 52 on ونڈوز 10. If this works in a different Firefox version or does not work in a specific Firefox version on various platforms let us and other users know in the comments section below.