Form History Control II

I am happy to announce that work on porting this extension to e10s and web-extensions has started.

Not all functionality from the current version can be ported due to limitations imposed by the new API.
Due to he lack of a decent FileIO-API importing and exporting history will be impossible. The new API is also missing services to interact with the browsers internal Formhistory storage, so the new add-on must gather and maintain its own copy.

Update 11 oct 2017:
I managed to get importing and exporting to work. You can even import files exported by the old extension!
This was high on my own priority list and I am very happy I got this working. It is also a very convenient way to get lots of data into the new extension for testing.