Mozilla Connect

Interesting idea. It might be something to consider for later iterations - FYI @asafko 

Thanks for pointing this out - I'll get a bug on file for it.

Thank you for taking a moment out of your day to leave a positive comment - it's very much appreciated by the team!

Its great to see all the interest in the sidebar and vertical tabs! We are working on expand on hover - its not quite ready but will be available soon. 

It works for me on windows 10. What version are you using?