Questions about fbpanel
 

1. I was playing with fbpanel for a couple of hours. It looks like it uses current gtk2 settings. It is possible not to use gtk with fbpanel? Does it have its own toolkit or something?

2. How to move buttons of windows in fbpanel (to change their order)?

3. About launchbar:
Icon is OK. But what if I want to set some file of icon, some image? It doesn't work out...
won't work. Quotation marks also don't solve the problem. So how do I do it?

FBPanel is a gtk2 app, so you will need gtk. The configuration can be found in your home directory under .config/fbpanel. You can change the order by moving the appropriate chunks of code around. The parts of the configuration that are plugins use the "icon" syntax, but all the things you might want to add will use "image" instead. Hence, in your example,

button {
icon = /home/alex/preffered-icon.png ### Replace "icon" with "image"
tooltip = Firefox
action = firefox
}