How to save all tabs in bookmarks (including repeated ones)
Before there was an addon for this purpose: http://forums.mozillazine.org/viewtopic.php?f=48&t=795945 Summary: "This extension makes "Bookmark This Page", "Bookmark This Tab" and "Bookmark All Tabs.." behavior equal with Firefox2. (This extension fixed Bug 450437 – duplicate URLs dropped when bookmarking all tabs )" Unfortunately it does no longer work with recent FF builds for a while.
Opaite Mbohovái (1)
There is no easy way to bookmarks duplicate tab. You would have to make a copy of such a bookmark like you would normally do to have multiple copies of a bookmark.
There are extensions like these to have a list of tabs.
Bookmark Tabs to the Right https://addons.mozilla.org/firefox/addon/bookmark-tabs-to-the-right/ All Tabs Helper https://addons.mozilla.org/firefox/addon/all-tabs-helper/ Copy All Tabs https://addons.mozilla.org/firefox/addon/copy-all-tabs/ tab list https://addons.mozilla.org/firefox/addon/tab-list/