This is a good thing, but just as a pet peave - why do people keep so many tabs open on desktop web browsers? Every new tab uses more memory. Computers were not designed to have 100s of tabs open. There is no way anyone actually actively uses 100 tabs, and I see people all the time with so many tabs you can hardly even see what is there. There is a thing called bookmarks and folders for storing commonly visited sites on a computers hard disk rather than temporary RAM...
But I do think it is good firefox is adding the capability, as grouping can be useful if done right in moderation. But it's just kind of funny the person asking for the feature admits to having huge amounts of tabs open.
At least for me, I have ADHD—if it's out of sight (i.e. another bookmark in one of the hundreds of folders I have), it ceases to exist, no matter how important or interesting it is.
I have 6 virtual desktops for current projects, with all of the tabs (and other applications) for each project on a desktop, and with a Firefox window for each "topic" within that project. I go through and close out old windows periodically (i.e. when I need to free up desktops), saving anything I might want to refer back to with the Tab Stash plugin. Importantly, I also have the Auto-Discard Tabs plugin so they aren't using RAM until I need them again.
It might seem messy, but it's what works best for my brain. I do at least try to not have more than 12 tabs per window. On rare occasions I'm even successful! 🙃
pretty sure if you don't visit a tab for a while or reopen your browser with the "keep previous tabs" setting thingy on, those tabs are not all loaded in memory. even if I have 100 tabs open, most of them take up negligible space in ram and only load in once I click on it.
also I'm lazy and creating/deleting bookmarks is more work than closing/opening tabs.
I believe they do use just as much RAM as current tabs, it's just computers are better at handling it now.
Mozilla makes reference to them eating RAM, but I'm not 100% sure.
Use fewer tabs
Each tab requires Firefox to store a web page in memory. If you frequently have more than 100 tabs open, consider using a more lightweight mechanism to keep track of pages to read and things to do, such as:
Bookmarks. Hint: "Bookmark All Tabs" will bookmark a set of tabs.
Save web pages for later with Pocket for Firefox.
To-do list applications.
In general, yes more tabs = more RAM used, but Firefox does have a neat trick compared to Chrome that helps lower memory usage for those of us with hundreds of tabs. When you launch Chrome with a bunch of tabs open from a previous session, it actually loads them all into RAM at launch, with Firefox, it doesn't actually load the pages of tabs from previous sessions, until you switch to them. The page titles and icons get loaded into RAM, obviously, but if you have lots of old tabs that you almost never open, the memory usage impact of lots of tabs is minimized.
My excuse would be ADHD, I constantly lose track of what I'm focusing on and when I do focus on something I want to explore every part of it, that means exploring every path/solution/fact etc about it, then it's a I want to have this open because I will need in the future like tomorrow or I want to explore it more later so I don't want to bookmark it because I will lose my thought process, but time goes on and I will focus on something else and the cycle repeat.
I find it very hard to just close them because I keep thinking, I will need it soon but soon never comes or when it does I already closed it and now I'm blaming myself I didn't have it open.
It's a silly issue to have but it's how my brain works.
I, to my daughter: "For (this and that reason), you have to reboot your laptop." Daughter: "But then I have to close the browser!!!" - she basically uses hundreds of browser tabs as temporary bookmarks, having pages open for weeks occasionally. Having to close down the browser is a panic-inducing thing for her...
Try a session manager add-on. In the list view, it's easier to close the irrelevant ones, then save the important ones under a meaningful name, never to be restored - but just knowing it's there if needed brings peace to mind, at least for me.
Unfortunately, the way many companies are set up these days, they require employees to use multiple different web applications to do their job. And if you're a developer, you need many different tabs for testing scenarios.
A tab may ascend to a bookmark once it has been verified good and/or useful.
Right now it is TBD, i came across it while looking at/for something and will keep going down that path, but want to take that tab page in in the future.
Vivaldi has tab hibernation so that the extra tabs barely take any resources unless you open them.
I use over 100 tabs. Basically serves as an always changing bookmarks. Those tabs are also split across multiple workgroups between which I can switch easily with a flick of my mouse.
Having tab groups is not identical to using 30 tabs simultaneously.
It's more like 2D bookmark layout, group by content, group by identity (cookies and co) and all with a website screenshot. It's faster, more visual bookmarks.