I use instead the bookmarks toolbar, where you create a folder by topic, select the open tabs with Ctrl, and do a drag&drop into the folder to store such urls. You can then press "Open all tabs" from within the folder when you need to, or individually.
When you have many folders in the bookmarks toolbar, an ">>" icon will appear at the end to the right of the bar, which will expand the rest of the folders vertically, that I scroll with the mouse wheel. So I have my at first sight folders of common use, and also the other ones by pressing ">>". I like much such dynamic (first sight horizontal, and ">>").
I do not like the folder-icon on such first sight bar with folders, I find it a bit distracting and takes up valuable space, so I have a css in userChrome.css to hide such icons (only there, not in the ones unfolded by ">>") leaving this way only the folder name, where I use short names.
This in combination with another css to show only icons for some bookmarks placed at such first sight (bookmarks with no name was the easier way for this). I also had to reduce the separation between such first sight bookmarks.
In addition, I also have the bookmarks button to the left of the url bar, which unfolds another group of different bookmarks vertically.
Sometimes I get the feeling that people are using tabs for what bookmarks were designed for, which is why the number of tabs open is so high.
About the OP, I often search several topics at once, and/or a topic with several sub-topics where the open tabs of different topics sometimes get visually mixed up or I lose the track/focus, for what this new tabs groups sounds ideal.
When you have many folders in the bookmarks toolbar, an ">>" icon will appear at the end to the right of the bar, which will expand the rest of the folders vertically, that I scroll with the mouse wheel. So I have my at first sight folders of common use, and also the other ones by pressing ">>". I like much such dynamic (first sight horizontal, and ">>").
I do not like the folder-icon on such first sight bar with folders, I find it a bit distracting and takes up valuable space, so I have a css in userChrome.css to hide such icons (only there, not in the ones unfolded by ">>") leaving this way only the folder name, where I use short names.
This in combination with another css to show only icons for some bookmarks placed at such first sight (bookmarks with no name was the easier way for this). I also had to reduce the separation between such first sight bookmarks.
In addition, I also have the bookmarks button to the left of the url bar, which unfolds another group of different bookmarks vertically.
Sometimes I get the feeling that people are using tabs for what bookmarks were designed for, which is why the number of tabs open is so high.
About the OP, I often search several topics at once, and/or a topic with several sub-topics where the open tabs of different topics sometimes get visually mixed up or I lose the track/focus, for what this new tabs groups sounds ideal.