Test and fix for Safari

[andrew]

Currently I've only tried the extension in Firefox, may need some tweaks to get it all working correctly in Chrome, Safari and other browsers.

[andrew]

Did a little test in chrome but it's pretty broken right now, making requests to octobox.io from the extension doesn't send cookies so the user isn't can't log in.

[andrew]

Icons aren't loading correctly in chrome atm

[andrew]

Main bugs squished in Chrome, not yet tested in safari