5punk

For some reason firefox has started to insist on opening on my second monitor. I have been through the options on the shortcut properties with regards to the Ultramon settings, and it still does it. Make it stop!

Firefox remembers where it was closed, soooo.....

"restore" the window, move it to yoru primary monitor, then close it.
Re-open, and ti should now open on the primary one.

However if I'm teaching you how to suck eggs, then fuck knows how to fix it.
You could temporarily disable your secondary monitor, open firefox, close it, then re-enable your secondary monitor again?

Aswell as windows settings that let you specify if a window remembers it's position I have options in my GFX card control panel that let you control where a window opens and if it remembers the settings/position,

Have look in there :

Randomly, as soon as i posted that, it stopped happening. I blame voodoo.