I was using Chrome for a while until I got tired of it opening dozens of separate processes, one for each tab. I switched back to FF and one thing I sorely missed from Chrome was their Tabs Outliner extension. It was fantastic. It had tons of options and the one I used was to display all tabs in all windows as a list of page titles with icons in a separate window. It was arranged by window with a subtree of tabs for each one. I could browse all my tabs in a couple of page downs. Nothing could be simpler or more useful for me as I have hundreds of tabs open in dozens of windows. This FF add-on is the closest thing I could find to Tabs Outliner but it is nothing like it. No option to display as list so you get a grid of thumbnails, occupying huge open spaces on the page, with the first word of the title for all hibernating tabs (I use Suspend Tabs to save on memory usage), which are the majority. So you can't tell what the thumbnails are referring to. Nothing could be more useless or occupy more page real estate. Huge disappointment. I think at the very least, the author should implement the tree list idea of Tabs Outliner as an option. That's the only way this could be salvaged.