Rated 4 out of 5 stars
Works fine as far as it goes, but missing the Symbol Codes and Custom Tag features in the other BBCode AddOn https://addons.mozilla.org/en-US/firefox/addon/128 which unfortunately won't install in SM v2.02
Add those features and you'll have it all.
Working on it
I'm currently working on adding Custom Tags, no plan on adding Symbol Codes (but you can use Custom tags for that).