Vertical tab bar hide and restore

[misterperson42]

When I have vertical tabs turned on, I can drag the tab bar to change the width, and I can make it bigger so it shows the text of the tabs, or I can make it so it only shows the icons (which I prefer). But I can also drag it to have a width of zero, which I don't think is a bad thing. I think Firefox developers should keep the option to be able to completely remove the tab bar from view and only use the "list all tabs" button in the top left, or just know your tabs by memory, as I believe this is a really cool feature. 

The only problem is, when I do drag it to be closed all the way, I can't drag it back. I can put my mouse over to the right side of the screen, and it will turn from a very fine white line to a very fine blue line, but if I drag it, it won't bring back the tab bar. I have to, for example, press Ctrl + H to open History and then press the X in the corner to get the tab bar back to the icons-only setup. 

The tab bar should be able to be dragged to have a width of zero (which is possible), but should also be able to be dragged back (which is not possible). 

[Jon]

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