No, because as soon as you click on "large" browser window, the smaller one will drop to the background immediately. It won't stay on top.
You could of course move the window next to your main browser window - but, you would need to first open a new window, move your tab into that window, resize and position it manually... it's tedious.
Well, I can grab the tab off the browser window, then enable 'always on top'. But yep, that's more than one click, so I guess if someone does this all the time then it makes sense for them to automate it.
Yeah, I almost mentioned that I'm using gnome on linux but then I thought that this must be a ubiquitous feature. Now I'm surprised and have to look up if "always on top" was there in windows XP (the last version I've used) or not. :)
You could of course move the window next to your main browser window - but, you would need to first open a new window, move your tab into that window, resize and position it manually... it's tedious.
with TabFloater it's just one click :)