...nothing annoys me more than accidentally spawning new windows - that's what tabs are for.
The 'open new windows in tabs' option doesn't always work (?) & right-clicking on a link still gives the option to spawn a new window.
There are several addons that force single window mode, but none of them work for Firefox 4. I've also tried trawling through the about:config but with no luck.
Has anyone had any success?