So I updated to OSX Mavericks only to find that now Dashlane is completely useless as the browser extension for chrome as it no longer works at all, and never offers to auto-fill any login or other forms, plus when clicking the extension icon, all I see is the extension popup framework with a spinner icon in the middle.
Trying my hardest to like this product but it seems to be trying its best to make me not want to like it!
Hoping for a fix soon, else I will be left with little option but to switch back to LastPass.
*update* After speaking to support, and obtaining an uninstaller, uninstalled and initially tried installing the App Store version (based on supports suggestion to do so) and that version didn’t work in chrome at all. Then re-installed using the latest dmg from their website and it is working again.
Austin France's Blog 
Hi Austin – I had the same issue when I upgraded to Mavericks. Uninstalling and re-installing the chrome extension fixed it for me
I have just tried that today, under instruction from Dashlane support and it has left me with a greyed out non-functioning dashlane extension icon that doesn’t even popup a window now. Passed console logs (though I can’t see anything obviously relevant) back to support as they requested will have to see how it goes.
Thanks so much, this worked great for me 🙂 My guess is that their App is stuck in the App Store approval queue and has not been fully released their yet. Website version worked great!!