Rated 1 out of 5 stars

Completely useless.

necessary? Rated 1 out of 5 stars

is this function not present natively in firefox in the tabbar-context menu?

It is working and gets the job done Rated 5 out of 5 stars

For all of you saying it's not working, it only adds the button in the menu toolbar (Bookmarks) not the firefox button.
If you want it to be shown in the bookmarks drawer menu in the firefox button i suggest you customize the button menus with this.
Personal Menu (Personal Firefox Button) by Merci chao
goo.gl//eBSrF

Works great!! Rated 5 out of 5 stars

Worked from the moment I added it!!! I really don't see why they removed this option to begin with. It should be put back on FF

Not working Rated 1 out of 5 stars

Not showing for me in the Bookmarks menu

It ALMOST works Rated 2 out of 5 stars

If you click on the "alt" key to access the (normally hidden) menus, you can click on "Bookmarks" and choose "Bookmark All Tabs..." But it's not available on the normal menu path ("Firefox", "Bookmarks"). It's easier to just hotkey "ctrl" + shift + D, or right-click on any tab and choose "Bookmark All Tabs..." This Add-On doesn't really save any time or reduce the number of keystrokes needed to do the task. Again, close, but no cookie.

Perfect Rated 5 out of 5 stars

It adds the entry "bookmark all tabs" to the Bookmarks menu. When selected, you enter a folder name and it saves the tabs in the current window. This is exactly what's required as it effectively saves the tab group in a bookmark folder. In contrast, another popular addon I tried does not do anything sensible.