The most important for me are:
--help
--remote (or -remote if necessary)
--noraise (or -noraise if necessary)
The first I assume is obvious,
but it too is missing from FireFox 1.0!
The others are to allow opening pages in an existing
K-Meleon instance without having it assume focus.
See the discussion at
http://wp.netscape.com/newsref/std/x-remote.html
For example, when reading email, one generally wants
to open a series URLs in the background, without one's email
client losing focus. I use K-Meleon as the browser called
by my email client. Currently I must (I believe) set a global
preference for K-Meleon to deal with this.
Thanks,
Alan
PS (OT): I am curious why FireFox has dropped these:
not even --help works! Any clues?