This looked like the perfect addon which'd let me blend the distinction between tabs and bookmarks while keeping things organised. Alas, it doesn't actually do that.
* There's no tab management to speak of. I have several hundred tabs open, and it gives me absolutely no tools to organise them. In particular, they're the one thing I cannot search for, and I lose even the rudimentary "switch to tab" search function of the ordinary URL bar.
* The toolbar is an all-or-nothing proposition that does too much, yet fails to have even the basic functionality right.
* The back button menu is broken, and results in lots of flickering with inability to select anything.
* There's no reload function whatsoever (!?).
* Trying to edit the current URL is an exercise in misery, copying it is almost impossible, and most of the time when not visible it hijacks input from pages into the hidden input field.
* Because I have to remove the navigation bar, there's nowhere for my extension buttons to go, so I can't control adblock or noscript.
* The bing search is completely useless, and I cannot use any other searches I already have providers for. If the built-in search can provide me with snippets and autocomplete from google, why can't this extension reuse that?
Why reimplement things which work already and replace them with inferior versions? What it should have done is to make a navigation search menu which can be inserted in place of the usual URL bar, thus saving space for the rest of the elements, which should also be ordinary toolbar items I can rearrange. Back/forward, reload and extension buttons would continue to work as normal that way.
As for the actual "categorise" functionality, I'm still on the outlook for something I thought this was: a tool to let me forget there's a difference between tabs and bookmarks and manage the hundreds of tabs I have open. I browse and research in tabs, and I open them by the dozen as I do things. I switch contexts and get interrupted by external links all the time, which result in yet more open tabs. I cannot categorise them upfront, because most of the time I don't know what groups I will end up with, and I don't even plan for a lot of topics I end up researching. As I discover the next day that I'm not actually going to be able to implement this algorithm and read all the papers this week (or next), I want to be able to search through, select and group tabs, and file those tabs as bookmarks and read later items with their history intact (because how I got to the page is almost as important as its content). Then, when I sit down with a free weekend a month down the road, I should be able to find and restore them to the state I left them in. Other groups go for links to send to friends #1, #2 and #3, two of whom are currently on vacation and cannot receive my messages, so I need to file that for later. Yet more groups for the task I'm working on right now, where I have three bugreports open, and need to be able to file relevant links and articles related to bug #3, even though I cannot get to it before I'm actually done with #1 and #2.