Rated 2 out of 5 stars
Is it better than Web Developer Toolbar > Miscellaneous > Display Line Guides ?
I just installed but both option are showing disabled in Right Click > FoxGuide
I'm on Windows 7 and using Firefox 3.6.12 and I also have "Web Developer Toolbar" installed.
Don't know how to use FoxGuide?
You can switch on the addon by clicking a purple icon at the right corner.