Input focus on textarea not removing on left click with scroll

[NS-Clone]

in firefox (mypal in my case) when you click on textinput area
focus are moving on it
and cursor keys and pgdw pgup are using to navigate on text
in usual behavior focus removing if you click outside input textbox
but with ScrollAnywhere with enabled scroll on left key
it's not removing
and scroll with keys doesn't works on page more
until you make usual left/right click without ScrollAnywhere

also i'm using previous 8.7 version
because latest doesn't installing
and it may be not actual