It has most of the extensions I valued on Firefox (Evernote, Readability, Instapaper). It also has some that are new to me and work really well - for example, I'm using the Cortex extension - a great way to share something to (in my case) Twitter or to save to Instapaper.
If you've not used it, you might like to give it a try.
If you've not used it, you might like to give it a try.