I often just run ps aux, check the command line that runs it, then run the same command line as the same user to restart it.
In Lennart's world, nothing works with the reliability of a server, and you fix everything by restarting it. If that doesn't work, you file a bug report and they tell you "it's a feature" and mark it WONTFIX. It's a lot like the good old days with Bill, except with endless updates instead of subscriptions. Special thanks to Mozilla for making the only application I need that requires this garbage.