Thanks again to everyone that helped testing, reporting bugs and committing code to help with the release. It’s quite an achievement and I look forward to continue working with you all to make the add-on even better into 2018!
You can download it from https://addons.mozilla.org/firefox/addon/keefox/
Full installation instructions are at: Installing Kee (instructions)
For support, start by reading: Help and support
The main new and removed features in Kee 2.0 are outlined at: Kee 2.0 features
Enjoy! (please don’t break it straight away 
)
PS: The Google Chrome version is still undergoing beta testing but it should be nearly ready to go - try it out if you want.