Your comments

I'm getting a lot of strange behaviour in Tabs Outliner now. This started a few days ago.

There are Phantom Tabs (closing a tab in Chrome doesn't remove it from TO), and I'm also losing tabs when I quit Chrome (a Window had 5 tabs in it, I restarted Chrome, and now it only has 1 tab in it.)

The Phantom tabs only seem to happen when I quit Chrome and try to reopen the tab.

Could it be that my Tab Outliner database has gotten corrupted? Can I get your email so I can send you the database to look at?
I'd love a faster way to close tabs too.

It sounds like you use Tabs Outliner differently from us. I've been using it as a quick way to free up 3 gigabytes of memory when I have 30 or 40 tabs open. Then, I can clean them up without having to reload them all. I can also SEE THEIR TITLES in Tabs Outliner, which I can't do in Chrome when there's 40 tabs in a window.

I don't want to reopen 40 tabs just so I can close them with the middle mouse button. Their titles will still be impossible to read, as well. It would be far easier if I could do it in Tabs Outliner. (And Sidewise is far less useful than Tabs Outliner. :)

So, the Trash Can button has 3 problems right now:

1) When you click it to close a tab, it doesn't reappear until you move your mouse. (This makes it hard to close many tabs quickly.)
2) The button is on the right side of the Window, so I have to move my eyes to quite a distance see which tab I have selected.
3) The vertical size of the title is very small, and the highlight is very hard to see, which makes it easy to accidentally pick the wrong title and close it.

A middle click option would solve all of these problems.

If you are dead-set against this feature, would you consider a compromise? Maybe Ctrl-Middleclick? Or an option in the settings to decide what middle click does?

Thanks for your time!