This extension was formerly one I used daily. However, in the mere month since the release of Firefox 57 this extension has changed authorship not once but TWICE. At least twice now the extension has been updated to demand further permissions. In light of these out of the ordinary "developments", and considering that the most recent author appears to be Russian and knowing how much nationalistic partisan insanity is taking place now, I cannot reasonably trust it with my very personal details any more. I frankly don't trust my fellow Americans not to be greedy self-interested shits, but at least with them there's some hope that I can maintain some degree of oversight. That is simply not possible with an author living in a country antagonistic toward my own and lacking the same regulatory controls.

Addendum: here it is four months later, and AGAIN this extension is demanding new permissions, and THIS time it's unfettered access to the Windows clipboard! Nope, no possibility at all for malicious activities with that permission. This is precisely how abuse often happens: get people hooked on a potentially useful product, then slowly and patiently begin to pervert it to serve its creators' ulterior purpose.