No luck here. Rated 1 out of 5 stars
FF 24 and no context option.
I'll keep watch for an update that works...
Thanks for leaving the comment.
The context menu option is always there. Just remember that the option is available in the context menu, only when right clicked on a TEXT AREA field.
Please follow the screen shots. If you still cannot see the option, let me know your Firefox version and OS name & version.