it's not the easiest to use, but well worth it after the proofs are made and keybase client is intstalled. peace of mind from using the certificates and pgp keys is very reassuring.

Works great. As others have said, would be useful to be able to tell before clicking on the chat button whether they're on keybase or not, and you should also be able to open the options page (or a popup or anything) when you click on the toolbar icon

Works as expected, easy to use: install and forget. Been using it for months, don't plan to stop using it.
Tested on: HN, Reddit, GitHub

Works great

After updating it (i.e. the linux app/program and the extension) today, it finally works. On twitter and on facebook (and probably more websites) a keybase chat button appears, and clicking it a small chat window successfully transmitted a message via my local linux app. My expectation to be able to see whether someone uses keybase.io or not, was not fulfilled - this information is accessible only after clicking the chat button (or the symbol in the browser tool row).

Doesn't work at all. The icon on the toolbar doesn't do anything when clicked, and this error appears in the browser console: "TypeError: this.browser is null ExtensionPopups.jsm:319:7"

I'm running on Nightly 59. I believe this is caused by this webextensions bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1394019

The button for sending messages on supported websites does not look intrusive. It blends in well with the style of the existing websites.

Makes messaging Keybase users much easier.

Works smoothly and well. Good to know if someone has a Keybase profile or not from Twitter.

I like it for privacy perposess.

Nice approach! Will implement this.

A more convenient way to share encrypted messages or lookup someone on keybase, saves me the effort of copy/pasting usernames into the app. Also works as a reminder for myself to use keybase more often. Great job guys, and thanks for making it a webextension and open-source!

-- And I just found the setting to query profiles passively, neat.