It does actually. You have to disable web browser code signature checking and start some program (Agile1pAgent.exe iirc) which then runs in the background. Full instructions: http://eduardosanchez.me/2015/01/25/1password-on-ubuntu-linu...

Wow. I expected otherwise, but am glad to be shown wrong.

You can always use document.querySelector() to target elements using a css selector

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