Layout.word select.eat space to next word
From MozillaZine Knowledge Base
This preference controls the selection behaviour when double-clicking text as it relates to the space following the text.
Possible values and their effects
Select the space up to the following word. (Default on Windows and Mac OS for all apps except Minimo)
Do not select any extra spaces. (Default on all platforms except Windows and Mac OS and on Minimo)
First checked in
Has an effect in