It doesn't show up as a separate task. I have to go to Firefox and find the window. It's not as easy as an alt-tab and gets lost in all my other web apps that are in my browser.

Chrome+Firefox support pulling tabs out as individual apps, with a separate window icon + launcher

well, Firefox did, until Mozilla (of course) removed it

Chrome still supports it

Secunding blibble's comment, the wrapper mode works fine in Chrome, and links will open in the standard Chrome instance so there is little downsides UX wise.

Extensions aren't as accessible if you use them a lot, and of course you're stuck with Chrome though.