You certainly can't run wmii with compiz - they're both window managers, and you can only run one window manager at a time.
It looks like the people who have re-opened this bug are actually experiencing a Firefox bug that curiously doesn't manifest under Metacity. If I had to make a guess, I'd say it's due to differing "legacy fullscreen" support. It might be useful for people who can reproduce this bug to attach (not inline, please!) the output of "xprop" on the firefox window.
You certainly can't run wmii with compiz - they're both window managers, and you can only run one window manager at a time.
It looks like the people who have re-opened this bug are actually experiencing a Firefox bug that curiously doesn't manifest under Metacity. If I had to make a guess, I'd say it's due to differing "legacy fullscreen" support. It might be useful for people who can reproduce this bug to attach (not inline, please!) the output of "xprop" on the firefox window.