I like that "Vertigo Tabs" provides a display of "open Tabs" in the current Firefox window, (the display appears on left side of screen and I can narrow/widen its display field). While I must close the tab at top of screen (a minus), the ability to display ALL open tabs in the current window (even though only perhaps 40 will actually display at a time), helps greatly in knowing what all I've kept open in tabs, (though perhaps it also encourages me in the bad habit of opening TOO MANY tabs). All in all, I consider this, to be one of my MOST valuable Add-Ons.

No close button, so 4/5 from me. Finally, a bug free vertical tab bar! Works great with "dom.event.contextmenu.enabled;false" unlike many others.

It does what it should.

However, there are some minor thingies it still lacks that would make it perfect:
1. A hover-on X button for closing a tab. Yes, I know about the middle mouse button but I don't like to use it, I've never done so, and I wouldn't like to do so. (No, I'm not a Macintosh user. :-)
2. A "New tab" or a "+" button somewhere, including "Restore recently closed tab". Yes, I know of Ctrl+T and of the History menu but still.
3. Tooltip to see the entire page title that is cut by Vertigo's list.
4. Option to hide the original tab bar. I know there's a pending API issue that'll enable this functionality. Until then it's possible via .css editing.

Good addon, but hasn't close button like redux tab.

This is good, to replace tab mix plus when it goes away. Tax mix had of course tons of options, but to me and others the main thing is simply being able to easily see names of all open tabs which one cannot do by default with a single row of tabs.

However, this addon has the problem that it is too hard to read the names of the tabs, particularly if firefox is restarted and the tabs names for the tabs not having been visited are rendered in a very faint font.

I have had to mess around in chrome files before to fix errors in how firefox grabs style from the environment on linux, so I can probably fix it myself after taking a look at the source (or alter the source), but I think this is a real problem that has to be fixed.

I agree totally that one doesn't want a huge number of options (like eg tab mix plus!) but this faint font is not a "sane default" at all for me! (Makes it unuseable, really)

It's okay, suitable as an immediate replacement for TST.
One thing I'd really like to see implemented: auto-hiding of the sidebar after a couple seconds with it popping back up as I mouse over to the left side. I like to preserve as much screen space as possible.

It's good yeah, it just lack some features for me, like the close button, the audio button but most importantly a clearer way to divide them, because as of now it's a compact list of an icon and text on his right.

This is a replacement for Vertical Tabs Reloaded that consumes far less memory, and doesn't slow down Firefox !!!

It still lacks some features, such as the button to "close" a tab, access to the tab menu from the sidebar or hide the horizontal tab bar from Firefox.
But it is fully usable now :-)

NB: Tested on Firefox 54 / Xubuntu 16.04 with 5 windows and more than 135 tabs open.