Problem: a core of 10 or 20% of people haven’t upgraded from Firefox 2 for whatever reason. And it’s coming to end of life.
Thought: perhaps those people have techno-literate friends who would nag them to do so, if it were obvious that they hadn’t upgraded. But at the moment, unless you are very familiar with theme changes, you have to remember to go into Help | About to check.
Idea: should the next 2.0.0.x update put the version number into the title bar?