I discovered FoxyTab on 6/24/2020. I especially like the ability to copy all (in the "current" window of FireFox) URLs, or all URLs/Webpage-Titles, to the clipboard, and then paste them (manually) into a file for documentation/future-use. I use Vertigo Tabs to display information on left margin of screen (for approximately 40 tabs viewable at once on my 28" monitor). I run Windows Task Manager all the time (to gauge my RAM usage) and I tend to have 4-10 windows open; sometimes enough open tabs to slow, or even crash either FireFox or the entire computer. By gaining the ability to copy all of one window's URLs, and then close that window, I can probably better avoid some crashes. What might help even more, would be the ability to use these saved-tabs later (on the clipboard) to simultaneously re-open the same URL-tabs (I submitted a "FoxyTab Issue").
Then I could also, in a fairly simple way, open multiple windows where each has different URLs/tabs.

Also, currently I have installed "FireFox Portable 2nd Profile 2.0 App", which allows me to have multiple "iterations" of Firefox Portable. I.e., when I terminate a particular "iteration" of Firefox, all the then-current windows and tabs can be (are, in my case) preserved to be restored when I next execute that particular "iteration."
IFF FoxyTab could simultaneously re-open multiple-URL-tabs (from the clipboard), I could optionally STOP using "Firefox Portable 2nd Profile 2.0 App, and simply create a "backup tabs file" for each window of what is now an iteration, and the totality of those backed-up tabs/windows would represent the equivalent of what is now a FireFox iteration. Plus, I could mix-and-match "windows" (of what currently are in fixed relationships due to the different iterations.)

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Great extension. Needs 2 features found on Firefox v56 and before, though. You can use Waterfox with the Classic Theme Restorer to get these features, but they have regrettably disappeared in FF v57 and above. Waterfox is from the mozilla version 56 code base and still supports virtually all of the legacy extensions, but is starting to get a bit too bloaty and, even with no add-ons loaded, has memory leaks that can bring it up well over 2 GB just sitting open for 24 - 48 hours. Still worth looking into for those who lost add-ons they can't live without since FF re-wrote its engine in version 57. It can also use current FF extensions like FoxyTab, btw. It shares profile information with your current FF & can run concurrently.

1. Ability to locate tabs right above display windows, under the bookmark bar. Infinitely better user-friendly design.

2. Allow for tabs in a designated number of multiple rows instead of extending the tabs off the end of the screen and needing to arrow back and forth to get to unexposed tabs. For those with a number of tabs open at a time, this is the best way to display all tabs without resorting to gimmick.

Those two additions would bring FoxyTabs up to a solid 5 stars and more.

je vais essayé Foxy Tab

excellent concept and very useful and versatile.

все понятно и доступно, удобно пользоваться. спасибо.