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Steem Keychain is a Chrome extension @trincowski, but I was never going to use Google Chrome (I stay as far away from Google as I can reasonably manage ...). Fortunately, the Brave Browser I do use supports Chrome extensions, so Keychain works just fine.

And it is also supported by SteemPeak, which is the Steem blockchain interface I use almost exclusively on my workstation (Partiko "on the road" ...).